I'm thinking about how to capture the My Chemical Romance sound in Strudel — driving power chords, fast punk-style drums, and that emo/pop-punk energy — and translating those musical elements into a Tidal Cycles-based pattern. I'm planning to write an original progression inspired by the genre rather than copying an actual MCR song, using a common minor-key emo chord movement (i-VI-III-VII) at a fast tempo, with drums built from kick, snare, hi-hats, and crash hits to get that driving rock feel in Strudel's syntax. For guitars, I'll use power chords through explicit stacked notes with a sawtooth-like tone and lowpass filtering rather than relying on chord/voicing helpers, layering everything with `stack()`. I also realize Strudel doesn't natively export a standalone .mid file — it only supports WebMIDI output via `.midi()` — so I'll need to address that limitation for the user's request. Now I'm sketching out the actual song structure: E minor at 165 BPM, an MCR-style verse progression of Em-C-G-D, and a slightly reordered chorus progression like G-D-Em-C for more lift and energy. To build the full arrangement, I'll use Strudel's `arrange()` function, which sequences multiple patterns over specified cycle counts — perfect for stitching together verse and chorus sections into a complete song. Now I'm working out the power chord voicings for the punk guitar riff, using root-fifth-octave shapes that change each bar while keeping a driving eighth-note strum pattern underneath. I'm also considering a simpler pattern where each chord repeats 8 times within its own bracket segment, or building power chords by adding root-fifth-octave intervals to a base note sequence with `.add(note("0,7,12"))`. I'm not fully certain whether `.add()` works cleanly with note names versus numbers, so to be safe I could just spell out the power chords explicitly instead of relying on that trick. For the arrangement itself, I'm sketching a structure by bar counts: a short intro with a clean arpeggiated riff, then an 8-bar verse with eighth-note power chords over standard drums, building toward a chorus with more open, sustained chords. I'm now working out the tempo and drum groove, setting things around 165 BPM and laying down a classic punk beat—kick-snare-kick-snare with steady eighth-note hi-hats stacked in the same pattern, plus a crash to kick off sections. Writing more drum patterns... Still writing the pattern syntax... Actually I realize `ply(8)` is simpler than struct here — it repeats each chord event 8 times per cycle to make eighth notes, so I'll apply that same approach to the guitar chords for each root. Now I'm double-checking whether `.add("0,7,12")` works with note names in Strudel — recalling that the core arithmetic operators handle note strings by converting them through noteToMidi internally. This actually confirms it — I now recall the Strudel docs explicitly showing `note("c3 e3 g3".add("<0 5 7 0>"))` as a documented example, with the note names converted internally to midi numbers before adding. But I'm less sure whether `add` supports stacked/comma patterns like "0,7,12" for building chords in a single call. Rather than risk that uncertainty, I'll just write out chords explicitly using bracket-and-comma notation instead. Reconsidering the `.ply(8)` on stacked chords, applying it to a chord like `[e2,b2,e3]` should turn the whole cycle into 8 repeated chords, which is exactly the effect I want. Really, the user's ask about a "midi file" probably just means they want a full song coded in Strudel format, so I'll build a pattern using Strudel's built-in sounds and note how to route it out via `.midi()` if needed. For the guitar sound design, I'm considering a sawtooth wave shaped with a low-pass filter and some distortion — trying to recall whether Strudel's effect is called `.shape()` or `.distort()`, since I know it borrows from SuperDirt's waveshaper conventions. I recall both `distort` and `shape` being real Strudel effects with usage examples like `.distort("<0 2 3 10:.5>")`, so I'll settle on using `.distort()` with a moderate value to add grit to the sound. I'll pair a sawtooth bass with a lowpass filter around 900-1500Hz plus light distortion and a touch of room reverb for texture. For the lead, I'm thinking triangle or square wave with filtering and vibrato, composing a melodic phrase in E minor (E F# G A B C D) that moves over the Em-C-G-D chorus progression. I'm weighing chorus progressions now—wanting something anthemic without echoing existing songs too closely. I'll settle on C - D - Em pattern for the first half and shift to C - D - G - D for the second half to create a lift into the hook. For the bridge, I'm considering a half-time feel using Am - Em - C - D, aiming for a more theatrical, stripped-back moment before the final chorus. Structuring the full arrangement: intro 4 bars, verse 8, chorus 8, verse 8, chorus 8, bridge 4, chorus 8 — totaling 48 bars, which at 165 BPM comes out to roughly 70 seconds, a reasonable loop length. I'm now working out how to sequence these sections so the chord alternations within each part reset properly and start from the right chord at each section's beginning. This confirms that alternations restart at each section's beginning, so the verse's `` always starts on Em, an 8-bar verse repeats the 4-chord progression twice, and an 8-bar chorus with 8 chords fits exactly one-to-one. I'm also working out drum fill placement so fills land on bars 4 and 8, setting the tempo with `setcps(165/60/4)`, and checking which default drum samples Strudel provides out of the box. Standard bank names include `bd`, `sd`, `hh`, `oh`, `cr`, `rd`, `ht`, `mt`, `lt`, `cp`, `rim`, `cb`, `sh`, `perc`, `misc`, `fx`, and I'm recalling the many available drum machine banks like RolandTR909, RolandTR808, LinnDrum, AkaiLinn, and others from various eras. I'm settling on `RolandTR909` since it reliably includes bd, sd, hh, oh, cr, rd, ht, mt, lt, cp, and rim — a safe, complete kit even if not strictly "rock," and it'll sound fine with some distortion or compression applied. Wait, since they said "midi," I should reconsider whether to use drum sample names at all versus GM MIDI drum notes for DAW compatibility — `s("bd")` doesn't map to MIDI note numbers when using `.midi()` output in Strudel, so for a genuine MIDI-target version I'd need to use `note()` with standard GM drum mappings (36 kick, 38 snare, 42 hat, 46 open hat, 49 crash) instead. I'll structure the answer as a browser-playable Strudel version using synths and samples, plus a brief note on swapping to `.midi()` output and converting drums to GM notes. Now I'm writing the full pattern with tempo setup and power chord definitions... Adding more chords, then writing the guitar verse pattern using template literal chord progressions — checking whether Strudel's mini-notation transpiler handles backtick template strings the same way it auto-converts double-quoted strings. I recall that `note("c e g")` without the transpiler would actually be parsed as mini-notation through `reify`, which checks if the input is a string and passes it through `mini()` to convert it into a pattern rather than treating it as one literal event. Wait, this reveals a real gotcha: since the transpiler converts double-quoted strings into `mini()` calls producing Pattern objects, assigning one to a const and later using it in a template literal interpolation would stringify the Pattern object instead of behaving like a plain string. That matches why Strudel conventions reserve single quotes for plain strings and double quotes for pattern-accepting positions like `.bank("RolandTR909")`. So the safe move is to define chord-string variables with single quotes (e.g. `'[e2,b2,e3]'`) so template literal usage remains valid, though I should flag the fragility if someone swaps quote styles. I'm also weighing whether it's simpler to just inline the mini-notation directly rather than use intermediate variables, or construct power chords via `.add()` on note patterns instead. Now I recall how Strudel's `appLeft` combines patterns structurally: onsets from the left side combine with overlapping right-side events, so stacking three notes on the right yields three combined events per onset — confirming the stacking approach works for chords. Still, I think I'll go with explicit chord strings for safety rather than relying on this mechanism. I also want to check `ply`, which repeats each event a given number of times, working well with alternation and stacks like `<[e2,b2,e3] [c2,g2,c3]>` to build arpeggiated chord cycles. I'll use `ply` for this rather than manually repeating notes with `*8`. For rhythm, I'm considering giving the chorus a syncopated strum feel using `struct` patterns or gain accents like `"[1 .7]*4"` to create dynamic emphasis. For the guitar tone, I'm weighing a sawtooth oscillator with lowpass filtering and distortion, checking that Strudel's `distort` function takes an amount value with an optional postgain, though I'm cautious that sawtooth plus distortion could sound too harsh without tempering it. I'm also considering `supersaw` for a thicker "wall of guitars" texture, but since I'm unsure if it's reliably available in the user's Strudel version, I'll fall back on layering detuned sawtooth notes using fractional midi values to simulate that effect safely. For the bass line, I'm thinking of a low sawtooth or square wave pattern with a lowpass filter, cycling through notes like e1, c2, g1, d2 — though e1 might be too low for laptop speakers, so bumping it up to e2 could be safer for audibility. For the melody or vocal lead, I'm considering a triangle or square wave with a gentle vibrato effect to give it an emotional, emo-style quality. Now I'm sketching out the chorus melody in E minor over the C-D-Em-Em-C-D-G-D progression, working bar by bar with an anthemic rhythm feel, using rests and note durations in mini-notation to shape each phrase. Continuing to sketch bars 6-8, then realizing each `<>` alternative needs its multi-note bars wrapped in nested brackets to work correctly in mini-notation. Actually I realize `cat` is simpler for this — each string argument occupies one full cycle rather than being squeezed, so `cat("bar1", "bar2", ...)` naturally spreads eight one-bar melodies across eight cycles without needing `.slow(8)`. I'm thinking through the intro design instead—maybe a clean arpeggiated guitar over Em C G D building with kick drum in the last bar, echoing something like a lone piano opening. I'm sketching the arpeggio pattern for each chord, weighing whether to write explicit note names or use scale-degree shorthand with `n()`. Building intro drum arrangement... Applying the ramp so it only ramps during the snare-roll bar while hats in the previous bar ramp too works nicely. Now I'm turning to the verse sections — thinking about how to make the guitar sound palm-muted using a shorter envelope with quick decay and sustain settings. For the chugging effect I'll shorten note durations with `.clip()`, which scales duration like legato — giving verse guitar a muted, low-pass filtered chug versus a brighter, fully-open chorus guitar tone. For stereo spread I'm considering panning each guitar layer separately (left and right) and slightly detuning one using midi-note fractions, so the two guitars sit apart in the stereo field with subtle chorus-like thickness rather than alternating pan per note. Not worth the complexity — maybe just stay mono or add subtle room reverb for width instead. I'm also weighing whether to switch synths to something like a supersaw with unison/detune/spread params, but I'm wary of relying on a feature that might not exist in the user's Strudel version. To be safe against unknown parameter names, I'll just use `s("supersaw")` with defaults rather than risk calling `.unison()` or `.detune()` if they don't exist, and I'll be cautious about `distort` too since an unsupported function would silently break playback. The syntax uses "amount:postgain" format, like "10:.5" for amount 10 with postgain 0.5 to control loudness. I'm considering using distort with a moderate amount like 1.5 and possibly adding gain adjustment beforehand to balance the output level. I'm settling on `distort` rather than the older `shape` alias, since I'm fairly confident distort is the current documented function. Now I'm mentally double-checking each function I plan to use against the Strudel API to avoid errors—starting with confirming `setcps` is valid. Also confirming `firstOf`/`every`, `.mask`, `saw.range()`, and `silence` as valid. Then checking sound sources: `supersaw`, `sawtooth`, `square`, `triangle` waveforms, plus `piano` and general MIDI soundfont instruments like `gm_acoustic_grand_piano` that come bundled as defaults in Strudel. I'm particularly noting the GM soundfonts like `gm_distortion_guitar`, `gm_overdriven_guitar`, `gm_electric_bass_pick`, `gm_electric_guitar_clean`, and `gm_choir_aahs` — these could be great for a rock/MCR-style vibe, and they're documented as built-in soundfont support in Strudel's synths section. I'm recalling the full GM instrument naming list, trying to enumerate the standard set with the `gm_` prefix like pianos, organs, and mallet percussion instruments. Listing more GM soundfont names... These fit the "MIDI" request well since it's literally General MIDI, and switching to `.midi()` output would route notes to the user's DAW. I'm considering whether GM drum soundfonts exist too, noting the slight load delay on first play is acceptable. For drums I'll use `.bank()` samples instead since Strudel doesn't include soundfont drums. I'm working out the guitar tone details -- power chords via `gm_distortion_guitar`, using `.clip(0.5)` to tighten the chugging rhythm, and checking whether the soundfont player respects ADSR envelope parameters. For palm-muted verse riffs, `gm_electric_guitar_muted` is a natural fit, and I'm sketching the sound plan starting with a clean electric guitar arpeggio for the intro. Rather than muted guitar for verse rhythm, I'm leaning toward `gm_overdriven_guitar` for verses and `gm_distortion_guitar` for choruses, differentiating them with `clip` and `lpf` settings, and now thinking through bass sound choices too. For the lead/vocal melody, I'm weighing options between a sawtooth synth, a triangle wave with vibrato, or even a vocal-ish `gm_voice_oohs` sound to capture that gang-vocal MCR feel, before settling on possibly doubling the distortion guitar an octave up for a lead line. I'll build the chorus melody around distorted guitar with room and delay, and consider adding choir aahs in the final chorus for that theatrical gang-vocal effect, keeping volumes moderate since soundfonts can get loud. I'm also second-guessing whether a TR-909 drum kit fits a punk-rock feel, thinking an acoustic kit might suit better. Still recalling sample names... Still listing sample bank names... Finishing the sample name list, I notice `cr` and `gretsch` stand out — `gretsch` is actually a real acoustic drum kit with about 24 samples, though it's unclear which index maps to which drum piece within Strudel's default dirt-samples setup. Now I'm recalling the actual workshop example: `s("bd hh sd oh")` from Strudel's "First Sounds" tutorial, with the standard drum abbreviations being bd, sd, hh, oh, cp, rim, cr, rd, ht, mt, lt, cb, sh, and these come from the default sample bank without needing an explicit bank selector. To be safe, I'm reasoning that specifying `.bank("RolandTR909")` ensures consistent sounds, since TR909 covers bd, sd, hh, oh, cr, rd, ht, mt, lt, cp, and rim reliably across most drum machine banks. I'll briefly note the `.midi()` alternative for routing drums to external MIDI devices with channel selection, then move into drafting the full Strudel piece itself, starting with the tempo setup for the emo/pop-punk track. Defining chord progressions... I settle on bass roots matching guitar notes but an octave lower where realistic, keeping e1/c2/g1/d2 since a bass guitar can't go as low as c1. Then I set up a distortion guitar function and think about stacking two panned guitar layers for stereo width on the verse riff. For the doubling effect, I decide a small time offset like .01 cycles (~14.5ms) gives that natural doubled-guitar slap feel without events spilling awkwardly, and consider wrapping this into a reusable helper that pans one guitar left and the other right with a slight delay. For the strumming pattern, I'm working out how to combine an 8-step gain accent pattern with struct so each chord stack triggers correctly across all 8 pulses, keeping the rhythm's dynamics natural. Now I'm sketching out the drum section, setting up a helper for the drum kit sound bank and starting to build the verse drum pattern. I'm thinking about how to model real MCR drum patterns—straight rock beats with kick on 1 and 3, snare on 2 and 4, driving 8th-note hats, and crashes on choruses, versus a faster punk/D-beat feel for higher-tempo sections. Landing on a verse pattern alternating kick and snare with a doubled kick hit, something like "bd sd [bd bd] sd" as the safe, driving option. For the chorus, I want a crash hit on beat 1 followed by continuous open hats across the remaining eighth notes, working through how to notate that so the crash lands cleanly on the downbeat and the seven open-hat hits fill the rest of the bar evenly. I'm reconsidering the hi-hat pattern since open hats might sound too washy with the long 909 decay, so I'll switch to ride cymbal eighth notes for a more classic rock-chorus feel, keeping the crash on bar one since the four-bar cycle repeats. I'm also thinking through how the fill bar interacts with the kick/snare pattern underneath it. Now I'm restructuring the drums into separate layers so kick/snare and cymbals can have independent gain levels, stacking a louder kick/snare part against a quieter cymbal part. I'm sketching an intro build-up: bars 1-2 clean guitar alone, bar 3 adds a quarter-note kick, bar 4 layers in a crescendoing snare roll using a saw envelope for gain, gradually ramping intensity into the full groove. For the bridge I'm shifting to half-time at 165bpm — kick on beat 1, snare on beat 3, quarter-note hats underneath, maybe a floor tom variation and a crash on bar 1, then building tension in the final bar with an accelerating snare pattern leading back into the main riff. For the bridge instrumentation, I'm thinking clean or muted guitar arpeggios reusing the intro's arp function over the bridge chord progression, paired with a sparse half-note bass line to leave room for the buildup. I'm also weighing adding a choir pad for that theatrical MCR vocal-harmony feel, considering whether to offset the chord notes up an octave using `.add(12)` on the note pattern, and recalling that Strudel's docs show `add` working directly on note-name patterns to transpose them. For the intro arpeggio I'm setting up separate four-note chord voicings... Defining arp progressions... I'm considering whether to write out arpeggios explicitly with n() and scale() instead of relying on arp() indices, since chord ordering matters for how the arpeggiator selects notes. Now I'm sketching the chorus lead melody across 8 bars, matching each phrase's rhythm and pitch choices to the underlying chord (C, D, Em, Em, C, D, G, D), checking each note against the chord tones to keep it melodically sensible. Bar7 rises over G, and bar8 resolves toward D with a held E note leading back into the Em or C section. I'm also considering whether vibrato works well on the soundfont distortion guitar lead, since that modulation is typically built for synth oscillators rather than sampled instruments. Instead I'm planning reverb and delay effects tuned to the tempo, working out delay times matched to a dotted eighth note at 165 BPM to keep the echo rhythmically locked in. I'm also weighing whether to add a vocal-style texture using oohs voices, maybe as a commented-out alternative, and considering sketching a simple repeated verse melody in a lower register to round out the song's structure. Sketching out the remaining bars against the chord changes, checking that each melodic note fits as a chord tone or passing tone, and noticing the rhythm is repetitive across bars — I'm considering varying bars two and four slightly, though it might work fine as a simple verse pattern. For instrumentation, I'm weighing clean electric guitar versus a voice-like patch for the verse melody, leaning toward using an "oohs" voice sound to make the song concept clearer, but worrying its slow attack might blur fast eighth-note runs. Settling on clean electric guitar for the verse vocal line, distortion guitar for the chorus lead, and adding choir aahs on the final chorus for a theatrical, gang-vocal feel with reduced gain. Now I'm starting to build the arrangement stack for the intro section. For the intro, I'm layering the chord progression with the drum kit, using a saw wave ramp to modulate the kick/snare gain dynamically as the section builds. Then I'm assembling the verse stack, combining doubled clipped guitar chords with low-pass filtering, bass, vocal melody, and a driving drum pattern to establish the full band arrangement. Now I'm building the chorus stack similarly, adding gain patterning to the guitar strums... I'm refining the bass helper to take roots and an optional rhythm pattern, then adding a choir layer for the bridge using sustained power-chord voicings with gm_choir_aahs, considering whether to use the plain bridge progression or the richer arp voicings for a fuller "oohs" texture. Now I'm building triad voicings for the chorus chords (C D Em G etc.) at octaves 3-4 so I can reuse them for both arpeggios and the choir stack in the final chorus. Adjusting voicing to a lower, ringing chord with root, fifth, octave, and major third stacked. I'm also mapping out the full arrangement structure—intro, verses, choruses, bridge—and considering adding a short two-bar outro hit with a crash cymbal, keeping the whole sketch around 100 lines with comments. Still designing the outro... Adding more instrument helpers... I'm double-checking whether string-to-mini conversion applies uniformly across default params and template literals, since `note` and `struct` both reify strings at runtime anyway. Then I'm considering whether `.arp()` needs to be chained on the raw mini-notation string before wrapping in `note()`, matching the pattern from the docs example, or whether it also works when applied after `note()`. Looking at `arpWith`'s implementation, it collects stacked haps (a chord), reifies the picked index via the given function, then inner-joins — so it should still work on haps whose values are `{note: 'c'}` objects after `note()`, since it just groups and selects by index regardless of value shape. Testing whether an 8-step index pattern like `"0 1 2 3 2 1 0 1"` correctly cycles through chord indices each cycle, picking notes modulo chord length. Now I'm trying to recall the exact soundfont naming convention Strudel uses — whether it's `gm_piano` or something more granular like `gm_epiano1`, `gm_epiano2`, `gm_harpsichord`, and other GM instrument names I've seen listed in the docs. Still listing GM instruments... Listing more GM instrument identifiers... Good, that confirms the rest of the instrument list is covered. Soundfont playback should handle clip, lpf, and late modifiers fine since those apply generically through the effect chain. Now I'm structuring the arrangement with sections for intro and verse at their bar lengths. Continuing the arrangement... I also need to make sure the final expression returned is the arrange call itself, since Strudel plays whatever the last statement evaluates to — defining constants beforehand and calling arrange last should work correctly. Compressing works by mapping each section's fast-multiplied cycle into its relative slot within the total span, then stretching the whole thing with `.slow(total)` so the arrangement loops once per full total-cycle period. That confirms each `<...>` alternation inside a section advances correctly relative to that section's own repeated fast cycles, so the verse's chord sequence starts fresh at the beginning of each verse repetition. Actually let me redo the math properly: after `fast(8)` the shift is 0.01/8, then compressing into the section's slot (width 8/50 of a cycle) scales it down further to 0.01/8 * 8/50, and `.slow(50)` multiplies back by 50, landing at 0.01 cycles in real time — so the timeCat compression and the slow cancel out and it works as I originally expected. That also clarifies how `saw` behaves per cycle once fast/compress/slow are applied within a section. I'm also checking that `delaytime(.27)` stays in absolute seconds, unaffected by these time transforms, and confirming that `.clip(.55)` on the eighth-note struct events shortens each 0.18s hit down to about 0.1s for a nice chug effect. One thing I want to flag: with six voices from the distorted guitar layering plus bass, drums, and lead all summing together, the overall gain levels might push the master output into clipping since Strudel doesn't seem to have a limiter. I'm settling on more moderate gain values across the mix — guitars around .4, bass .7, drums at 1, lead .55, arps .5, choir .3 — to keep headroom. I'm sketching out the verse melody using `cat` with mini-notation strings for each chord section, mapping note sequences like B3-B3-B3-E4-D4 for the Em section, then C4-D4-E4 for C, G4-F#4-E4-D4 for G, and F#4-E4-D4-E4 for D, each fitting four beats per bar. Now I'm reworking this to feel more emo/anthemic — B3 B3 | B3 E4 | D4 | rest for the Em bar, echoing an "I-am-not-a-fraid" rhythmic phrasing, then similar rest-note-note-rest patterns for C, G, and D bars, ending on E over D to build tension back into Em. Writing chorus melody... That confirms the bar-4 rhythm works out correctly. Now I'm checking the bridge chord progression (Am-C-Em-B) and considering whether the arpeggio voicings should stay in a consistent register or vary naturally like a real guitar part, comparing octave ranges across chords. Basing the arps on standard open guitar chord shapes: Em, C, G, D, Am, B in their typical positions, then picking four-note voicings from each shape... For the bridge drums I'm sketching a pattern that builds intensity with alternating bass/snare hits and a snare roll accelerating into 32nd notes by beat four. Still working out cymbal and bridge bass patterns... Now I'm layering in a choir pad on the bridge chords for sustained warmth, and sketching a sparse melody line over the Am-C-Em-B progression to add some vocal-like texture. Actually, I think it's cleaner to keep the bridge purely instrumental as a breather section — arp, choir, half-time drums, and bass — and skip a dedicated melody line here, letting the energy build back up into the chorus instead. For the final chorus I'm layering in the choir with an arpeggio pattern stacked over the existing drum-and-instrument mix, then moving into an outro built from a clipped, low-passed guitar hit, a plucked bass note, and a stripped-down kit pattern to bring the track down gently. Confirming that `!` replication works inside brackets for the hi-hat pattern, and sketching the fill bar's drum hits so the kick, snare, and rolling sixteenths land naturally across the four beats. I'm dropping the gain boost on the kit to avoid clipping the 909 kick, and deciding to skip distortion on drums since the guitars already use soundfonts — keeping the delay and room settings as they are for a spacious rock feel. I'm settling on "cleanLead" for the verse guitar tone, confirming the tempo setup with setcps, and adding a note that gm_ sounds may need swapping for sawtooth if they fail to load. I'm also weighing whether the MIDI output mode would properly handle drum triggers versus note-based instruments. For MIDI, I'm sketching guidance to convert instruments to MIDI channels—using midichan and midi() for melodic parts—and mapping drums to standard GM note numbers (kick 36, snare 38, hat 42, ride 51, crash 49) on channel 10, though I'm still working out how to translate drum sample names into those note numbers cleanly. I'm also verifying that .midi() disables audio effects like lpf, that multiple .midi() calls in a stack all output correctly, and that cat() and note() work fine together when passed mini-pattern strings via the transpiler. For the arrangement itself, I'm checking helper functions like bass and gtr that build note patterns and apply struct, clip, and gain—confirming these chain correctly regardless of call order. I'm also planning the intro so the arp voicings build progressively and the bass enters on bar three. Adding the masked bass with a one-line build is worth it, and the bass pattern aligns nicely with the four-bar Em-C-G-D intro. Now I'm putting together the full track: setting the tempo to 165 BPM with one cycle per bar, then starting to write out the complete Strudel code section by section. Defining chord vocabulary... Defining bass lines for each section... Actually I realize bridgeProg should really be called bridgeArp since it's using open voicings rather than power chords, and I should double check that my local variable names like c and d don't collide with Strudel's built-in globals. I'm settling on plain objects to hold power-chord and open voicings by name, then a small helper function that joins chord names into a bracketed progression string—cleaner and avoids naming collisions with Strudel globals. I'm trying to recall whether Strudel's `.add()` works on objects by matching keys like `note` to `note`, or whether it requires raw number patterns added before wrapping in `note()`. I'm not fully certain which form is correct, so I'm weighing both possibilities against typical documentation examples. I'm trying to recall how the union logic handles mixed types—objects versus plain numbers—and whether numeric addition broadcasts across object fields, while also second-guessing my memory of specific `.add()` examples from the docs like applying offsets to note patterns. I decide to just use explicit template-literal strings and an object-based chord vocabulary to avoid ambiguity, rather than relying on uncertain recollections of Strudel's arithmetic behavior. I'm also trying to recall whether the transpiler's acorn-based parser treats template literals the same as plain string literals for mini-notation wrapping, thinking through how it walks `Literal` versus `TemplateLiteral` nodes and checks for quote styles. Single-quoted strings stay as plain strings and aren't transpiled, so `chords.join(' ')` works safely either way, and any static parsing attempt for highlighting is unlikely to break things. As an alternative to avoid template literals altogether, I could use `cat()` to sequence one chord per bar instead. Since `cat` reifies its plain string arguments through the mini-notation parser just like `slowcat` does with `cat("bd sd", "hh")`, I can build a helper `prog` function that wraps `note(cat(...chords))` to spell out a chord progression, one chord per bar. I'm defining verse and chorus guitar progressions using this helper, plus matching bass note sequences, then thinking through instrument wrapper functions that apply things like distorted guitar tone and gain to whatever pattern gets passed in, so the chord progressions stay separate from the sound design. Confirming the arp pattern and struct approach work for the chords, then double-checking gain automation on the intro drums. Now I'm assembling the complete final Strudel piece, starting with the header comments naming the track and setting the key and tempo. Setting BPM and defining the power chord vocabulary... Adding chorus and bridge progressions... Finishing the chorus melody line, then I move to defining the instrument palette—setting up distorted and doubled clean guitars with panning for a full stereo spread. Adding more instrument helpers... Building out the verse and chorus sections now, layering palm-muted guitar chugs with bass, delayed vocals, and the punk beat, then opening things up for the chorus with ringing guitars and crash rides. Starting to sketch a bridge section as a half-time breather to contrast the driving energy before it. I'm laying out the full song arrangement with section lengths, then catching a bug where a second `.gain()` call after `dirty()` overrides the first instead of multiplying it, making the chorus guitar too loud — I need to combine them as a multiplied gain pattern instead. Actually, I realize Strudel has a separate `.velocity()` parameter that multiplies with gain rather than replacing it, so I can use that for the accented rhythm pattern instead of fighting with `.gain()` order. For the verse section, I'll simplify by not overriding gain from `clean`, just adding delay and delaytime. For the outro, I'm structuring the bass and note patterns so they trigger once per cycle with alternating bars, checking that the clip duration and struct pattern line up correctly across the two-bar phrase. Now I'm checking the intro's kit and bass layering — the bass masks correctly to bars 3-4 with a specific rhythm, and the kit pattern builds up gain over a saw envelope. I'm also verifying the beat pattern structure repeats three times before varying, and starting to check the hats pattern for consistency. The bridge drums use a stripped-back pattern with cymbal accents and hi-hats, and the choir voicing sustains chords per bar since the soundfont attack is slow enough to allow it. The last chorus stacks the chorus pattern with the choir pad, and I'm tallying up the arrangement — the total comes to 50 bars, roughly 72.7 seconds before looping. Now I'm moving on to check the lead's distorted guitar voicing. Checking the double-tracking helper that pans copies left and right with a slight delay for width, and confirming the chorus guitar's distortion, velocity, and lowpass filtering settings are applied correctly before doubling. I'm also verifying that the bass rhythm parameter properly converts string patterns into mini-notation regardless of whether it's a simple or complex rhythm string, and confirming the bass note pattern applies its rhythm structure correctly. Now I'm tracing how `cat` with mini-notation string arguments works — each string gets parsed into a stacked chord pattern via the mini parser, then `cat` cycles through them, and wrapping the result in `note()` converts each value into a proper note object. I'm confirming that the string parser is properly registered for `reify` so these bracketed note-list strings get interpreted correctly rather than passed through raw. I recall now that there's a `miniAllStrings()` function that calls `setStringParser(mini)`, and the REPL invokes this on startup — that's why plain strings passed to functions like `note()` in strudel.cc get automatically parsed as mini-notation, whether they're literals or variables. Single-quoted strings only get reified as patterns at runtime, whereas double-quoted ones get transpiled at parse time for syntax highlighting. Since sequencing functions like `slowcat` map over their arguments with `reify`, any single-quoted strings passed to `cat(...)` or `note(...)` will properly resolve into patterns — this confirms my chord progression approach will work correctly. Now I'm tracing through how `.arp()` handles a stacked chord pattern, recalling that `arpWith` uses `collect()` to group haps sharing the same whole into arrays before applying the arpeggio index mapping. So `arp` itself picks elements from that collected array by index using a pattern, cycling through with modulo, then unwraps the underlying value like note objects. That matches applying `.arp` on a pattern of chords before naming notes, so ordering it before or after `note()` should behave consistently. I'm reasoning through `collect()` gathering simultaneous whole-cycle haps into a single multi-value hap, then `arp` slicing that into subdivided steps per its pattern — stacking order likely determines value order, though that's a minor detail. Checking that `saw.range(.4, 1)` is valid since `saw` is a built-in signal with a `.range` method, and confirming that within `kit("<~ ~ bd*4 [bd*4, sd*16]>")` the bracket with a comma creates parallel/simultaneous subpatterns. For `drums(beat, hats)`, I'm setting up `kit(beat).gain(1)` layered with `kit(hats).gain(.5)`, plus a `.bank("RolandTR909")` call, all wrapped inside an `arrange` call. I'm now double-checking that `arrange` is indeed part of Strudel's core API — recalling it's documented as a way to sequence multiple patterns across cycles, taking arrays of `[cycleCount, pattern]` pairs. I'm also running through the rest of the function list to confirm they're all valid Strudel functions: `mask`, `late`, `clip`, `velocity`, `room`, `size`, `delay`, `delaytime`, `delayfeedback`, `lpf`, `pan`, `struct`, `arp`, `cat`, `stack`, `setcps`, `s`, `note`, `bank`, `gain` — all check out, along with the global signal generators like `saw`, `sine`, `tri`, `square`, `rand`, and `perlin`. Now I'm double-checking my variable names for naming collisions with Strudel globals, opting for `PWR` and `OPEN` instead of `P` and `O` to be safe, and verifying that names like `prog`, `bass`, `choir`, `lead`, `kit`, `drums`, `verse`, `chorus`, `bridge`, and `outro` don't clash with any built-in Strudel effects or functions — I'm not sure if `chorus` is a reserved effect name, so I want to be careful there. I'm reasoning through whether declaring a local `const beat` would safely shadow any global `beat` function, depending on how Strudel injects its globals into the evaluation scope — if it uses `globalThis` assignment, shadowing is fine, but if it uses `with` or scoped `let/const` declarations, that could cause a conflict. To sidestep this entirely, I'm deciding to rename my section variables to safer names like `INTRO`, `VERSE`, `CHORUS`, `BRIDGE`, `LAST_CHORUS`, and `OUTRO` instead of risking collisions with built-in identifiers. I don't recall Strudel having a built-in `chorus` name, so shadowing should be safe—though I want to double-check whether Strudel's evaluation wraps user code in a scope where destructured globals could cause a redeclaration conflict with `const`. I'm considering how Strudel's evaluate function structures that scope. Since globals get merged onto `globalThis` rather than declared with `const`, user code can freely shadow them without a syntax error. I'm now scanning through other likely reserved names like `bass`, `lead`, `clean`, `kit`, `drums`, `dirty` to confirm none of them are actual global functions I'd be colliding with. I'm weighing performance implications too: distortion guitar soundfont voices are layered heavily but should stay within CPU budget, and I'm sanity-checking release/clip behavior on soundfont notes before settling on conservative gain levels and a short note to the user about tweaking volumes. 165 BPM should still work fine for punk-style eighth-note chugs. Now I'm double-checking the chorus melody's rhythmic notation beat by beat to make sure the rest and note groupings line up correctly with the intended timing. Verifying the verse melody notation next, then confirming the arrangement structure with the outro placement. I also want to double-check that the intro's arpeggiated clean guitar part correctly references the verse's chord progression pattern. I'm applying the same arpeggio pattern to the bridge section, using it both plucked and sustained via the choir voice, and considering minor filter tweaks to keep the guitars from muddying the mix. I'll also plan to wrap up with a header comment covering tone tips and a short explanation of the song's structure for easy tweaking afterward. Now I'm double-checking each drum pattern's bracket nesting across the bars — verifying the crash/hi-hat stacking, the bass/snare subdivisions, and the alternating rest/hit sequences all line up correctly within their angle-bracket groupings. I'm also verifying the bass mask pattern accepts numeric 0/1 values (confirmed from Strudel docs), calculating the tempo conversion for setcps, and checking the outro's dirty/struct/clip/lpf chain for the reversed chord voicing. I confirm `velocity` is a valid Strudel control multiplied with gain, and that `saw.range(0.4, 1)` works for gain modulation. The code structure looks solid overall, so I'm doing a final pass on the weighted `cat` pattern inside note() with its `@` duration weights. I'll finalize by presenting the code as a single block with brief notes on what it is, how to run it, tweak parameters, and route MIDI, plus a fallback suggestion to swap gm soundfont names for synth-based sounds like supersaw or distorted sawtooth if the samples don't load. Reusing that same lead melody over the last chorus works fine, and I don't think a pre-chorus section is needed. I want to note the MCR-inspired design choices worth highlighting—the i-VI-III-VII progression, 165 BPM tempo, palm-muted verses building into big open choruses, a half-time bridge, and gang-vocal choir textures—and I'm double-checking that the drum kit setup correctly includes the bank and cymbal layering across sections. I'm settling on final variable names for the drum patterns and section labels, then I'll write out the complete code block with brief explanatory notes. Here's an original MCR-flavoured emo/pop-punk "song" written for Strudel. It uses General MIDI soundfonts (distortion guitar, picked bass, choir…) so it plays instantly in the browser, and it's trivially re-routable to real MIDI (see the notes below the code). ```js // ===================================================================== // "SAINTS OF THE PARKING LOT" // an MCR-flavoured emo / pop-punk sketch for Strudel (strudel.cc) // key: E minor · 165 BPM · intro-verse-chorus-verse-chorus-bridge-chorus-outro // Paste into https://strudel.cc and hit Ctrl+Enter // (first play takes a second while the GM soundfonts load) // ===================================================================== setcps(165 / 60 / 4) // 165 BPM, one cycle = one bar of 4/4 // ---------- chord vocabulary (single quotes on purpose = plain strings) ---------- const PWR = { // power chords (root, 5th, octave) for the dirty guitars Em: '[e2,b2,e3]', C: '[c2,g2,c3]', G: '[g2,d3,g3]', D: '[d2,a2,d3]', Am: '[a2,e3,a3]', B: '[b2,fs3,b3]', } const OPEN = { // open-ish voicings for clean arpeggios & choir Em: '[e3,g3,b3,e4]', C: '[c3,e3,g3,c4]', G: '[g2,d3,g3,b3]', D: '[d3,a3,d4,fs4]', Am: '[a2,e3,a3,c4]', B: '[b2,fs3,b3,ds4]', } const prog = (...chords) => note(cat(...chords)) // one chord per bar // ---------- progressions ---------- const verseGtr = prog(PWR.Em, PWR.C, PWR.G, PWR.D) // i VI III VII – the emo classic const chorusGtr = prog(PWR.C, PWR.D, PWR.Em, PWR.Em, PWR.C, PWR.D, PWR.G, PWR.D) // VI VII i i VI VII III VII const verseArp = prog(OPEN.Em, OPEN.C, OPEN.G, OPEN.D) const chorusPad = prog(OPEN.C, OPEN.D, OPEN.Em, OPEN.Em, OPEN.C, OPEN.D, OPEN.G, OPEN.D) const bridgeArp = prog(OPEN.Am, OPEN.C, OPEN.Em, OPEN.B) // iv VI i V – drama! const verseBass = note("") const chorusBass = note("") const bridgeBass = note("") // ---------- melodies ("vocals") ---------- const verseVox = note(cat( // tight, sing-along verse line "[b3 b3] [b3 e4] d4 ~", // Em "[~ c4] [c4 d4] e4 ~", // C "[g4 g4] [fs4 e4] d4 ~", // G "[~ fs4] [e4 d4] e4 ~", // D )) const chorusVox = note(cat( // big soaring chorus hook "[~ e4] g4 a4 [g4 e4]", // C "fs4 a4 [b4 a4] fs4", // D "[e4 g4] b4 ~ [a4 g4]", // Em "fs4 e4@3", // Em "[~ e4] g4 a4 [b4 a4]", // C "fs4 a4 b4 [d5 b4]", // D "[g4 b4] d5 [b4 g4] a4", // G "a4 fs4 e4@2", // D )) // ---------- instruments ---------- const dirty = (p) => p.s("gm_distortion_guitar").gain(.4) const dbl = (p) => stack(p.pan(.2), p.pan(.8).late(.01)) // double-tracked L/R guitars const clean = (p) => p.s("gm_electric_guitar_clean").gain(.5).room(.5) const bass = (p, rhythm = "x*8") => p.struct(rhythm).s("gm_electric_bass_pick").lpf(900).gain(.7) const choir = (p) => p.s("gm_choir_aahs").gain(.3).room(.8).size(.9) const lead = (p) => p.s("gm_distortion_guitar").gain(.5) .room(.6).size(.8).delay(.35).delaytime(.27).delayfeedback(.3) const kit = (p) => s(p).bank("RolandTR909") // try "LinnDrum" / "AlesisHR16" too const drums = (kicksnare, cymbals) => stack(kit(kicksnare).gain(1), kit(cymbals).gain(.5)) // drum vocabulary const punkBeat = "<[bd sd [bd bd] sd]!3 [bd sd [bd sd] [sd sd sd sd]]>" // driving beat, fill every 4th bar const hatsBar = "<[cr hh!7] [hh*8]!3>" // crash on the 1 of each phrase const rideBar = "<[cr rd!7] [rd*8]!3>" // ---------- sections ---------- const intro = stack( clean(verseArp.arp("0 1 2 3 2 1 0 1")), // clean arpeggio bass(verseBass, "x ~ x ~").mask("<0 0 1 1>"), // bass sneaks in kit("<~ ~ bd*4 [bd*4, sd*16]>").gain(saw.range(.4, 1)), // snare roll build ) const verse = stack( dbl(dirty(verseGtr).struct("x*8").clip(.55).lpf(1500)), // palm-muted chug bass(verseBass), clean(verseVox).delay(.25).delaytime(.27), drums(punkBeat, hatsBar), ) const chorus = stack( dbl(dirty(chorusGtr).struct("x*8") .velocity("1 .7 .85 .7 1 .7 .85 .7").lpf(2800)), // open, ringing chords bass(chorusBass), lead(chorusVox), drums(punkBeat, rideBar), ) const bridge = stack( // half-time breather clean(bridgeArp.arp("0 1 2 3 2 1 0 1")), choir(bridgeArp), bass(bridgeBass, "x x"), drums("<[bd ~ sd ~]!3 [bd sd*2 sd*4 sd*4]>", ", hh*4"), ) const lastChorus = stack(chorus, choir(chorusPad)) // gang-vocal choir on top const outro = stack( // one big ringing Em dbl(dirty(note(PWR.Em)).struct("").clip(1.7).lpf(3000)), bass(note(""), "x").clip(1.7), kit("<[bd,cr] ~>"), ) // ---------- arrangement (bars, section) ---------- arrange( [4, intro], [8, verse], [8, chorus], [8, verse], [8, chorus], [4, bridge], [8, lastChorus], [2, outro], ) ``` **What makes it "MCR-ish"** - 165 BPM, straight-eighth punk drums with a snare