Piano synth · muse-spark-1.3
Output generated Cost / run $0.1301 Runtime 94.7s
Prompt for this run
Build a playable piano keyboard using the provided Tone.js library. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. Use the provided `tone.min.js` (global `Tone`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - Display one chromatic octave from C4 through C5, with correctly placed black and white keys and visible note labels. - Map computer keys A W S E D F T G Y H U J K in order to those 13 notes. Pressing a screen key or its computer key starts the note; releasing it starts the envelope's release phase. - Use a synthesized voice with an ADSR envelope and support at least three simultaneous notes. Highlight keys while held. Prevent keyboard auto-repeat from creating duplicate sustained voices. - Release held voices when the pointer is released outside a key or the window loses focus, so notes cannot remain stuck. - Activate audio through a user gesture and synthesize all sound without audio files. Display the computer-key mapping. Verify: Play a few notes using the available mouse and keyboard actions. Check note/key labeling, any observable press-and-release highlighting, and the console after audio activation. Briefly inspect the input handlers for matching note-start and note-release behavior.
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
METRICS
Transcript · 21 messages
Build a playable piano keyboard using the provided Tone.js library. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. Use the provided `tone.min.js` (global `Tone`) through a plain local script tag; the runner will inline it into the final artifact. Required behavior: - Display one chromatic octave from C4 through C5, with correctly placed black and white keys and visible note labels. - Map computer keys A W S E D F T G Y H U J K in order to those 13 notes. Pressing a screen key or its computer key starts the note; releasing it starts the envelope's release phase. - Use a synthesized voice with an ADSR envelope and support at least three simultaneous notes. Highlight keys while held. Prevent keyboard auto-repeat from creating duplicate sustained voices. - Release held voices when the pointer is released outside a key or the window loses focus, so notes cannot remain stuck. - Activate audio through a user gesture and synthesize all sound without audio files. Display the computer-key mapping. Verify: Play a few notes using the available mouse and keyboard actions. Check note/key labeling, any observable press-and-release highlighting, and the console after audio activation. Briefly inspect the input handlers for matching note-start and note-release behavior.
thinking
Building your playable piano — one octave, live synth, and keyboard control.
{"command":"ls -la; echo ---; ls -lh tone.min.js 2>&1 | head"}total 356 drwx------ 3 node node 4096 Oct 9 06:46 . drwxrwxrwt 6 root root 4096 Oct 9 06:46 .. drwxr-xr-x 3 node node 4096 Oct 9 06:46 .home -rw-r--r-- 1 node node 349169 Oct 9 06:46 tone.min.js --- -rw-r--r-- 1 node node 341K Oct 9 06:46 tone.min.js
thinking
Implementing a 13-key chromatic piano with Tonejs, ADSR envelope, polyphony, key mapping, and gesture-based audio activation.Selecting PolySynth with ADSR and pointer capture for note lifecycle handling.
{"command":"head -c 1500 tone.min.js; echo; echo ---; grep -o 'version[^,]*' tone.min.js | head -5"}/*! 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,type:"exponentialRampToValue",value:t}},h=function(t,e,s){return{endTime:e,insertTime:s,type:"linearRampToValue",value:t}},l=function(t,e){return{startTime:e,type:"setValue",value:t}},u=function(t,e,s){return{duration:s,startTime:e,type:"setValueCurve",values:t}},p=function(t,e,s){var n=s.startTime,i=s.target,o=s.timeConstant;return i+(e-i)*Math.exp((n-t)/o)},d=function(t){return"exponentialRampToValue"===t.type},f=function(t){return"linearRampToValue"===t.type},_=function(t){return d(t)||f(t)},m=function(t){return"setValue"===t.type},g=function(t){return"setValueCurve"===t.type},v=function t(e,s,n,i){var o=e[s];return void 0===o?i:_(o)||m(o)?o.value:g(o)?o.values[o.values.length-1]:p(n,t(e,s-1,o.startTime,i),o)},y=function(t,e,s,n,i){return void 0===s?[n.insertTime,i]:_(s)?[s.endTime,s.value]:m(s)?[s.startTime,s.value]:g(s)?[s.startTime+s.duration,s.values[s.values.length-1]]:[s.startTime,v(t,e-1,s.startTime,i)]},x=function(t){return"cancelAndHold"===t.type},w=function(t){return"canc --- version:()=>i});var t={};s.r(t) version=i;const _i=1e-6;function mi(t
thinking
Confirmed the local Tone.js — now crafting the octave with proper synth and input handling.
index.html (12789 bytes)Successfully wrote to index.html
thinking
{"action":"reload"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:35741/50bdc740-0b9f-4900-bdd6-160fd1a9ca5e' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio"],"dom":"🎹 Tone.js Piano — C4 to C5\n\nSynthesized with Tone.js PolySynth (ADSR envelope) · polyphonic · no audio files\n\n🔇 Click / tap any key or press a mapped computer key to enable audio\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nVolume\nRelease\nRelease all (panic)\nComputer keys: A → C4 · W → C#4 · S → D4 · E → D#4 · D → E4 · F → F4 · T → F#4 · G → G4 · Y → G#4 · H → A4 · U → A#4 · J → B4 · K → C5\nPress & hold a piano key (or its computer key) to start the note; release to hear the envelope's release phase. Play chords — many notes at once.","images":"attached"}
thinking
Layout looks right — now I'll verify that notes trigger and highlighting works.
{"action":"click","x":311,"y":443}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:35741/50bdc740-0b9f-4900-bdd6-160fd1a9ca5e' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio"],"dom":"🎹 Tone.js Piano — C4 to C5\n\nSynthesized with Tone.js PolySynth (ADSR envelope) · polyphonic · no audio files\n\n🔊 Audio on — play with mouse/touch or keys A W S E D F T G Y H U J K\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nVolume\nRelease\nRelease all (panic)\nComputer keys: A → C4 · W → C#4 · S → D4 · E → D#4 · D → E4 · F → F4 · T → F#4 · G → G4 · Y → G#4 · H → A4 · U → A#4 · J → B4 · K → C5\nPress & hold a piano key (or its computer key) to start the note; release to hear the envelope's release phase. Play chords — many notes at once.","images":"attached"}
thinking
Verifying a piano UI click at given coordinates and diagnosing missing console logs for note events.
Audio activation is working — now checking note triggering and release behavior.
{"action":"key","text":"a"}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:35741/50bdc740-0b9f-4900-bdd6-160fd1a9ca5e' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [piano] on C4 via kbd:a","log: [piano] off C4 via kbd:a"],"dom":"🎹 Tone.js Piano — C4 to C5\n\nSynthesized with Tone.js PolySynth (ADSR envelope) · polyphonic · no audio files\n\n🔊 Audio on — play with mouse/touch or keys A W S E D F T G Y H U J K\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nVolume\nRelease\nRelease all (panic)\nComputer keys: A → C4 · W → C#4 · S → D4 · E → D#4 · D → E4 · F → F4 · T → F#4 · G → G4 · Y → G#4 · H → A4 · U → A#4 · J → B4 · K → C5\nPress & hold a piano key (or its computer key) to start the note; release to hear the envelope's release phase. Play chords — many notes at once.","images":"attached"}
thinking
Keyboard play confirmed — now I'll verify mouse clicks trigger notes too.
{"action":"click","x":450,"y":465}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:35741/50bdc740-0b9f-4900-bdd6-160fd1a9ca5e' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [piano] on C4 via kbd:a","log: [piano] off C4 via kbd:a","log: [piano] on D4 via ptr:1","log: [piano] off D4 via ptr:1"],"dom":"🎹 Tone.js Piano — C4 to C5\n\nSynthesized with Tone.js PolySynth (ADSR envelope) · polyphonic · no audio files\n\n🔊 Audio on — play with mouse/touch or keys A W S E D F T G Y H U J K\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nVolume\nRelease\nRelease all (panic)\nComputer keys: A → C4 · W → C#4 · S → D4 · E → D#4 · D → E4 · F → F4 · T → F#4 · G → G4 · Y → G#4 · H → A4 · U → A#4 · J → B4 · K → C5\nPress & hold a piano key (or its computer key) to start the note; release to hear the envelope's release phase. Play chords — many notes at once.","images":"attached"}
thinking
Verifying pointerdown and pointerup events by attempting a drag motion to capture the active highlight state within the time budget.
Mouse and keyboard both fire paired start/release events — doing a final hold-highlight check.
{"action":"drag","toX":485,"toY":400,"x":485,"y":460}Frame 1, +0ms
[Browser image supplied to model]
{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: %c * Tone.js v14.8.49 * background: #000; color: #fff","error: Creating a worker from 'blob:http://127.0.0.1:35741/50bdc740-0b9f-4900-bdd6-160fd1a9ca5e' violates the following Content Security Policy directive: \"worker-src 'none'\". The action has been blocked.","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","warning: The AudioContext was not allowed to start. It must be resumed (or created) after a user gesture on the page. https://developer.chrome.com/blog/autoplay/#web_audio","log: [piano] on C4 via kbd:a","log: [piano] off C4 via kbd:a","log: [piano] on D4 via ptr:1","log: [piano] off D4 via ptr:1","log: [piano] on E4 via ptr:1","log: [piano] off E4 via ptr:1"],"dom":"🎹 Tone.js Piano — C4 to C5\n\nSynthesized with Tone.js PolySynth (ADSR envelope) · polyphonic · no audio files\n\n🔊 Audio on — play with mouse/touch or keys A W S E D F T G Y H U J K\nC4\nA\nD4\nS\nE4\nD\nF4\nF\nG4\nG\nA4\nH\nB4\nJ\nC5\nK\nC#4\nW\nD#4\nE\nF#4\nT\nG#4\nY\nA#4\nU\nVolume\nRelease\nRelease all (panic)\nComputer keys: A → C4 · W → C#4 · S → D4 · E → D#4 · D → E4 · F → F4 · T → F#4 · G → G4 · Y → G#4 · H → A4 · U → A#4 · J → B4 · K → C5\nPress & hold a piano key (or its computer key) to start the note; release to hear the envelope's release phase. Play chords — many notes at once.","images":"attached"}
thinking
{"command":"ls -lh index.html tone.min.js && grep -c \"triggerAttack\\|triggerRelease\" index.html && grep -o '<script src=\"tone.min.js\">'-rw-r--r-- 1 node node 13K Oct 9 06:47 index.html -rw-r--r-- 1 node node 341K Oct 9 06:46 tone.min.js 5 <script src="tone.min.js">
thinking
Done — `index.html` is saved (uses plain `<script src="tone.min.js">`, no external assets). What I checked in the browser: - Initial render: 8 white + 5 correctly placed black keys, each labeled with note name (C4…C5) and computer-key badge; full mapping line displayed below. - Mouse: clicked/dragged piano keys → console showed paired `on D4 via ptr:1 / off D4 via ptr:1` and `on E4 / off E4`; status pill flipped to "Audio on". - Keyboard: pressed `a` → console showed paired `on C4 via kbd:a / off C4 via kbd:a`, no errors besides expected pre-gesture AudioContext warnings and a sandbox worker-src block (Tone.js still initialized, v14.8.49). - Handlers inspected: `pointerdown→noteOn`, per-key + global `pointerup/pointercancel→noteOff`, `keydown (e.repeat guard)→noteOn`, `keyup→noteOff`, plus `blur/visibilitychange→releaseAll`; ref-counted `held` map keeps highlight (`active` class) while held and supports polyphony via `PolySynth(maxPolyphony 16)` with ADSR envelope. Not fully verified: sustained hold highlight mid-press (clicks are momentary in the harness), actual audible output, and 3+ simultaneous touches — code paths use PolySynth + per-source ref counts and should handle them.