Arpeggiator pad · deepseek-v4-flash-0731
Using the pre-provided tone.min.js (global Tone), build a clickable pentatonic pad grid that triggers a synth voice with reverb, plus a play/stop button that runs an arpeggiator sequence at an adjustable tempo. All sound synthesized, no audio files.
transcript · 12 messages
Using the pre-provided tone.min.js (global Tone), build a clickable pentatonic pad grid that triggers a synth voice with reverb, plus a play/stop button that runs an arpeggiator sequence at an adjustable tempo. All sound synthesized, no audio files.
thinking
Let me start by exploring the current directory and understanding the provided library. Let me check the current directory and the tone.min.js file.
{"command":"cd /workspace && ls -la && head -c 500 tone.min.js && echo \"\" && wc -c tone.min.js"}total 388 drwxrwxrwx 3 node node 96 Aug 1 12:52 . drwxr-xr-x 1 root root 4096 Aug 1 12:52 .. -rw-r--r-- 1 node node 349169 Aug 1 12:52 tone.min.js /*! For license information please see Tone.js.LICENSE.txt */ !function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e():"function"==typeof define&&define.amd?define([],e):"object"==typeof exports?exports.Tone=e():t.Tone=e()}("undefined"!=typeof self?self:this,(()=>(()=>{var t={382:function(t,e,s){!function(t,e,s,n){"use strict";function i(t){return t&&"object"==typeof t&&"default"in t?t:{default:t}}var o=i(e),r=i(s),a=i(n),c=function(t,e,s){return{endTime:e,insertTime:s 349169 tone.min.js
thinking
Tone.js is a UMD build that sets `t.Tone = e()` where `t` is global self/this. So `Tone` should be a global. Let me build the app.
I'll create a pentatonic pad grid (e.g., 5x2 or responsive). Let me design:
- A pentatonic scale. E.g., C major pentatonic: C D E G A across octaves.
- Grid of pads: maybe columns = pitches (5 notes per octave), rows = octaves. Each cell is a clickable synth pad with reverb.
- Play/stop button runs arpeggiator sequence at adjustable tempo (BPM).
- All synthesized, no audio files.
Let me build a nice minimal UI. I'll use Tone.Synth or Tone.PolySynth with Tone.FMSynth etc. Each pad triggers a synth voice with reverb (Tone.Reverb).
Design:
- Left: pad grid. Columns = 5 pentatonic notes (say of C major pentatonic: C4 D4 E4 G4 A4), maybe 3 octaves as rows.
- Each pad, on click, triggers a note.
- Arpeggiator: a sequence that goes through selected notes or all pads. Let me make it arpeggiate through the grid in order at adjustable tempo.
Let me implement:
Notes: use C pentatonic. Frequencies via Tone.Frequency(note).toFrequency().
Grid: octaves [3,4,5] as rows, pentatonic degrees [C,D,E,G,A] as columns. So 15 pads.
Arpeggiator: collects active notes? Or plays a fixed ascending/descending pattern across all grid notes. I'll make it arpeggiate through all notes in the grid (per beat step) with adjustable BPM. Better: an arpeggiator that cycles through a pattern. Let me make it cycle through scale degrees ascending across octaves.
Let me use Tone.Transport to schedule. Use Tone.Sequence or a loop via Transport.scheduleRepeat.
I'll create a Tone.Synth (polyphonic not needed since arpeggiator is single note, but for pad clicks need polyphony). Use Tone.PolySynth(Tone.Synth) with many voices, connected to reverb.
Let me build.
Arpeggiator pattern: The user says "runs an arpeggiator sequence at an adjustable tempo". I'll allow selecting an arpeggio pattern direction maybe. Keep simple: arpeggio through notes with selectable pattern (up, down, updown, random). And adjustable tempo (BPM slider). Let me include a pattern selector for niceness.
Let me design UI:
- Title
- Tempo control (BPM slider + display)
- Pattern selector (Up, Down, UpDown, Random)
- Play/Stop button
- Pad grid
For pads, each pad should indicate its note. Clicking triggers synth.
Let me also allow pads to be "activatable" for the arpeggiator? Keep it simpler: arpeggiator uses all grid notes in pattern. Actually a nice feature: clicking a pad toggles it on/off for being part of the arpeggio, and also short-click triggers sound. That's complex. Let me keep pads purely trigger on click, and arpeggiator runs through all 15 notes.
Actually, to make it more musical and interactive, I'll make pads toggle "active" state (highlighted) to include/exclude from arpeggio, while also triggering sound on activation. Hmm. Let me keep it cleaner: pads trigger sound on click; arpeggiator cycles through all pads with selectable direction. That satisfies requirements well.
Let me write the code.
I'll build with a nice dark theme, CSS grid.
Let me write index.html.
Implementation details:
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Pentatonic Pad Grid</title>
<script src="tone.min.js"></script>
<style>...</style>
</head>
<body>
...
<script>
// init audio
let started = false;
function startAudio(){ if(!started){ Tone.start(); started=true; } }
const synth = new Tone.PolySynth(Tone.Synth, { ... maxPolyphony: 32 }).toDestination();
const reverb = new Tone.Reverb({ decay: 3, wet: 0.4 });
synth.connect(reverb);
reverb.toDestination();
```
Actually let me set up: synth -> reverb -> destination, plus a bit of dry. reverb wet 0.45.
PolySynth options:
```js
const synth = new Tone.PolySynth(Tone.Synth, {
oscillator: { type: 'triangle' },
envelope: { attack: 0.005, decay: 0.2, sustain: 0.3, release: 0.8 }
});
```
Grid data — build in JS.
Note names C4 = MIDI 60. Pentatonic degrees from C: C, D, E, G, A. MIDI offsets: 0,2,4,7,9.
Rows (octaves): octave = [3,4,5]. For each row via Tone.Frequency(note). Use `Tone.Frequency({midi: m}).toNote()`.
Let me build pads:
```js
const degrees = ['C','D','E','G','A'];
const octaves = [3,4,5];
const midiBase = 60; // C4
const offsets = [0,2,4,7,9];
```
For octave o (where 4 => C4):
midi_center = 60 + (o-4)*12.
Each pad midi = midi_center + offset[i]. Note name = Tone.Frequency(midi, 'midi').toNote().
Arpeggiator: gather all midi notes in order (rows then cols). Pattern:
- up: ascending
- down: descending
- updown: asc then desc (ping pong)
- random: shuffle each cycle
Use Transport:
```js
let seq;
function startArp(){
const step = Tone.Time('8n'); // or based on pattern
seq = new Tone.Sequence((time, step)=>{
... play note ...
}, [0,1,2,...], '8n');
seq.start(0);
}
```
But notes depend on pattern each step. Better use Tone.Transport.scheduleRepeat with a pattern index.
Let me use a sequence of indices but recompute pattern. Actually simplest: scheduleRepeat at 8th notes, keep a counter, index into a precomputed note array that regenerates on pattern change.
```js
let arpNotes = buildNotes('up');
let arpIdx = 0;
let repeatEvent;
function makeArp(){
arpNotes = buildNotes(pattern);
arpIdx = 0;
}
function scheduleArp(){
Tone.Transport.cancel(); // careful cancels scheduled
repeatEvent = Tone.Transport.scheduleRepeat((time)=>{
const midi = arpNotes[arpIdx % arpNotes.length];
synth.triggerAttackRelease(midi, '8n', time);
highlightPad(midi);
arpIdx++;
}, '8n', 0);
}
```
Wait scheduleRepeat uses Transport tempo. Adjustable tempo = set Transport.bpm.value.
Pattern regeneration: on pattern change, rebuild arpNotes and reset arpIdx. Let me store current pattern variable and rebuild.
Actually to change pattern live mid-sequencing, I can rebuild on each cycle. Let me rebuild arpNotes when pattern changes and reset counter.
Let me handle play/stop:
- Play: startAudio, makeArp, Transport.start().
- Stop: Transport.stop(); also stop scheduling.
Tempo slider: on input, set Transport.bpm.rampTo(value, 0.1) or .value.
Highlight pad during arp: since pads identified by midi, and I store pad elements by midi.
Let me write clean code.
For pad click:
```js
pad.addEventListener('pointerdown', ()=>{
startAudio();
synth.triggerAttackRelease(midiToFreq, '8n', Tone.now? );
});
```
Use `Tone.now()` time; triggerAttackRelease(note, duration, time). Default time = now. Provide duration maybe '8n' or a few seconds? For a pad, a longer sustain ~ 1 sec "4n". I'll do '8n' or so. Let me do a pleasant length like "2n" for pad. Actually clicking pads triggering synth, use ~1.5s. I'll use '16n'? Let me use "8n" moderate. I'll make it "8n". Hmm pads usually sustain. I'll use "2n".
Let me also add visual press animation.
Now UI styling: dark gradient background, neon pads with glow, rounded. Grid with CSS grid: rows=octaves, cols=5.
Let me write it.
Let me create the full index.html./workspace/index.html (11047 bytes)Successfully wrote 11047 bytes to /workspace/index.html
thinking
Let me verify the file and quickly sanity-check the JS with a node-based syntax check for the inline script portion. Hard to run since Tone needs browser. Let me at least validate HTML/JS for obvious errors. I'll extract the script content and check syntax with node.
{"command":"cd /workspace && python3 - <<'PY'\nimport re\nhtml=open('index.html').read()\n# extract last <script> that isn't the src one\nsc/bin/bash: line 1: python3: command not found node:internal/modules/cjs/loader:1520 throw err; ^ Error: Cannot find module '/tmp/check.js' at node:internal/modules/cjs/loader:1517:15 at node:internal/main/check_syntax:33:20 { code: 'MODULE_NOT_FOUND', requireStack: [] } Node.js v24.18.0 Command exited with code 1
{"command":"cd /workspace && node -e \"\nconst fs=require('fs');\nconst html=fs.readFileSync('index.html','utf8');\nconst m=html.match(/<scrscript chars: 4889 JS OK
thinking
JS syntax is fine. Let me verify that index.html is present and finish.
The app is built and verified. Let me confirm the final file is in place:
{"command":"cd /workspace && ls -la index.html && grep -c \"tone.min.js\" index.html"}-rw-r--r-- 1 node node 11067 Aug 1 12:53 index.html 1
Done. I built the entire app as a single self-contained `index.html` in `/workspace` that loads the provided `tone.min.js` via a plain `<script src="tone.min.js">` tag (no CDNs or network), with all CSS/JS inline. ## What it does **Pentatonic pad grid (clickable voices)** - A C-major-pentatonic grid across 3 octaves (C D E G A × Oct 3/4/5), built dynamically with `Tone.Frequency(...).toNote()` for note naming. - Each pad triggers a **`Tone.PolySynth(Tone.Synth)`** voice (triangle oscillator with an ADSR envelope) so multiple pads can ring together. - The voice runs through a shared **`Tone.Reverb`** (algorithmic, no audio files) plus a dry path — plus each pad has its own neon glow color by scale degree and a press/flash animation. **Play/Stop arpeggiator + tempo** - ▶ PLAY / ■ STOP button drives a **`Tone.Transport.scheduleRepeat`** arpeggiator stepping through 8th notes across the whole grid. - **Adjustable tempo** via a BPM slider (50–200) that calls `Tone.Transport.bpm.rampTo()`; the live BPM is displayed. - **Arpeggio pattern selector**: Up, Down, Up & Down, and Random — live-rebuilds the ordered note list. - The arpeggiator flashes each corresponding pad as its note is struck. Audio is unlocked on first user interaction via `Tone.start()` (required by browsers), and everything is synthesized live — no audio files, no network requests. The inline script passed a `node --check` syntax validation.
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
EVALUATION
Clean pentatonic pad grid with play/tempo/arp controls; drag highlights pad with glow, click/wheel/keys show no visible change but audio not measurable.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.