Piano synth · kat-coder-air-v2.5
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 · 6 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.
/tmp/ws/index.html (14875 bytes)Successfully wrote 14875 bytes to /tmp/ws/index.html
Let me verify the file is in place:
{"command":"ls -la /tmp/ws/index.html /tmp/ws/tone.min.js 2>&1"}-rw-r--r--. 1 node node 15797 Aug 1 20:30 /tmp/ws/index.html -rw-r--r--. 1 node node 349169 Aug 1 20:29 /tmp/ws/tone.min.js
Done. `/tmp/ws/index.html` is ready alongside `tone.min.js`. **What's included:** - **29 keys** spanning C3–E5 (white + black), laid out like a real piano with black keys absolutely positioned over the white-key borders - **Mouse & touch** — click/drag across keys for glissando, mouseover while held continues playing - **Computer keyboard** — two rows mapped: - Lower octave: `Z X C V B N M` (white) + `S D G H J` (black) - Middle: `A S D F G H J K L ;` (white) + `W E T Y U O P` (black) - **ADSR envelope** — real-time adjustable Attack / Decay / Sustain / Release sliders that update the synth on the fly - **Waveform selector** — sine, triangle, square, sawtooth - **Volume control** (dB) - **Effects chain** — PolySynth → FeedbackDelay → Reverb → Master Volume - **Visual feedback** — keys light up blue (white) or indigo (black) and press down when active - **Audio context start** — a click-to-start overlay satisfies browser autoplay policy
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
Click reveals a clean piano synth UI with ADSR sliders and labeled keys; arrows/wasd/space don't play notes as expected but layout looks polished.
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.