Piano synth · qwen3.7-flash
Using the pre-provided tone.min.js (global Tone), build a playable piano keyboard controlled by mouse and computer keys that synthesizes notes with an ADSR envelope and visual key feedback.
transcript · 8 messages
Using the pre-provided tone.min.js (global Tone), build a playable piano keyboard controlled by mouse and computer keys that synthesizes notes with an ADSR envelope and visual key feedback.
thinking
Let me build a piano keyboard app using tone.min.js. I need to create a single index.html file that includes: 1. A visual piano keyboard (white and black keys) 2. Mouse interaction (click to play) 3. Computer keyboard mapping 4. ADSR envelope synthesis 5. Visual key feedback when pressed Let me first check what's in the current directory, then build the app.
{"command":"ls /tmp/ws/tone.min.js | head -1"}/tmp/ws/tone.min.js
thinking
Good, tone.min.js is present. Now let me build the piano app.
/tmp/ws/index.html (13514 bytes)Successfully wrote 13514 bytes to /tmp/ws/index.html
thinking
The file is written. Let me verify it's correct and complete.
{"command":"wc -l /tmp/ws/index.html && head -3 /tmp/ws/index.html && echo \"---\" && tail -3 /tmp/ws/index.html"}467 /tmp/ws/index.html <!DOCTYPE html> <html lang="en"> <head> --- </script> </body> </html>
thinking
The file is complete. Let me verify the structure is valid - no external requests, tone.min.js loaded via local src, everything inline.
Done! **`/tmp/ws/index.html`** — 467 lines, fully self-contained. Here's what's included: ### Features - **13-note piano keyboard** (C4 → C5) with white and black keys - **ADSR envelope** controls for Attack, Decay, Sustain, Release with live sliders - **Oscillator voice selector**: Triangle, Sine, Square, Sawtooth - **Mouse interaction**: click to hold/play, release to stop - **Computer keyboard mapping**: - White keys: `A S D F G H J K` - Black keys: `W E T Y U` - **Visual feedback**: keys glow purple (`#a78bfa`) when active - **Current note display** showing pitch name + frequency in Hz - **Web Audio API init overlay** — click "Start Playing" to unlock audio context (browser requirement) ### How it works 1. Tone.js `PolySynth` plays each key as a full note with its own ADSR envelope 2. On key-down: `triggerAttack()` starts the note and highlights the visual key 3. On key-up: `releaseAll()` triggers the release phase of the envelope and unhighlights the key 4. Black keys are absolutely positioned between white keys using calculated offsets
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
Piano UI with ADSR controls appears after click, drag activates keys visually; arrows/wasd/enter don't map to notes as expected.
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.