Piano synth · gpt-6.1-terra
Output generated Cost / run $0.0551 Runtime 66.8s
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 · 25 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
{"command":"ls -la && ls -lh tone.min.js","timeout":10000}total 356 drwx------ 3 node node 4096 Oct 26 23:46 . drwxrwxrwt 8 root root 4096 Oct 26 23:46 .. drwxr-xr-x 3 node node 4096 Oct 26 23:46 .home -rw-r--r-- 1 node node 349169 Oct 26 23:46 tone.min.js -rw-r--r-- 1 node node 341K Oct 26 23:46 tone.min.js
thinking
**Refining piano design** I need to implement a polished design for a piano interface. The design involves a cream canvas with a dark navy frame, and the title on the left. I must ensure there are 13 keys, with 8 white and 5 black, correctly positioned, including notes like C# and D#. Labels must be visible on each key, and I should manage multi-input sources meticulously. This includes precise handling of pointer events and audio timing for a responsive experience. I’ll keep thinking through these details!**Considering audio readiness** I need to ensure that the sound promise triggers an attack only if the note is still held down. If the note is released before the attack, there shouldn't be any sound. I also need a way to signal audio readiness, possibly using Tone.start() with each gesture. I should consider creating a poly synth using `new Tone.PolySynth()` with specific parameters like a triangle wave and an envelope, sitting at a volume of -8. I’ll check the Tone version, maybe v15, to ensure compatibility!
{"command":"head -c 300 tone.min.js && printf '\\n'","timeout":10000}/*! 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
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**Planning UI Implementation** I need to design a 1200x800 image layout with a centered navbar for the logo, title, and central card in warm gray. There should be a footer, and a keyboard size around 940px. For functionality, I’m considering a volume slider and sound toggle. I want audio activated by keydown or pointerdown events, creating a synth when gestures occur. It’s essential to handle note maps, pointer events, and multitouch precisely for the best user experience.**Addressing Keyboard and Pointer Issues** I need to consider how keyboard focus behaves after a pointerdown event on a button—ensuring it doesn't interfere with spacebar actions. I'll add responsive design for keyboard scrolling on smaller screens instead of making things too cramped. Checking browser compatibility is crucial for smooth functionality. So, I’ll definitely take the time to write out the necessary code and ensure everything works as intended.
index.html (14661 bytes)Successfully wrote to index.html
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{"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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":"i\nIVORY\nA LITTLE SPACE TO PLAY\nYOUR DIGITAL INSTRUMENT\nPlay a little.\n\nA moment for melody, whenever you need one.\n\nMAKE YOURSELF AT HOME\nNo experience necessary.\nSoft piano\nSynthesized keys · C4—C5\nREADY TO PLAY\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\n♧\nClick the keys or use your keyboard to play\nONE OCTAVE / 13 KEYS\nA NOTE FOR YOU\n\nPlay one note at a time, or put a few together.\nThere’s no wrong way to begin.\n\nKEYBOARD MAPPING · C4 TO C5\nA W S E D F T G Y H U J K\nMADE FOR LITTLE MOMENTS\nIVORY · YOURS TO PLAY","images":"attached"}
thinking
**Testing input tools** I need to test the mouse and keyboard functionality. I wonder if the tool only registers click actions and not any key downs. Maybe dragging involves holding the frame somehow? The action semantics for keyboard input aren't clear either. I think my next step should be to click something and then inspect the console for any insights. It’s a bit of trial and error, but I should be able to figure it out!
{"action":"click","x":149,"y":620,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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":"i\nIVORY\nA LITTLE SPACE TO PLAY\nYOUR DIGITAL INSTRUMENT\nPlay a little.\n\nA moment for melody, whenever you need one.\n\nMAKE YOURSELF AT HOME\nNo experience necessary.\nSoft piano\nSynthesized keys · C4—C5\nSOUND ON\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\n♧\nClick the keys or use your keyboard to play\nONE OCTAVE / 13 KEYS\nA NOTE FOR YOU\n\nPlay one note at a time, or put a few together.\nThere’s no wrong way to begin.\n\nKEYBOARD MAPPING · C4 TO C5\nA W S E D F T G Y H U J K\nMADE FOR LITTLE MOMENTS\nIVORY · YOURS TO PLAY","images":"attached"}
thinking
**Investigating click and sound issues** I'm looking into a potential issue where the first click doesn't play any sound if the button is released quickly. It seems like the Tone.start promise might resolve after the pointerup event, which could explain the missing sound. Since Tone.start is asynchronous, it might be resolving too late. I need to check if calling attack immediately, even when suspended, will help, or if there's a need for adjustments in scheduling. I want to make sure nothing gets stuck!**Revising audio attack strategy** I'm considering calling the attack as soon as the synth is created, which might make the audioReady flag unnecessary. Even if Tone.start() is asynchronous, it seems like the attack gets held unless it’s sounding. However, I could run into issues with losing the first tap. My plan is to fix the attack gating by triggering it immediately after Tone.start and ensuring the Tone objects are ready to resume quickly. I want to test how keyboard and mouse interactions affect the activation state.
{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"w","delta":0}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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":"i\nIVORY\nA LITTLE SPACE TO PLAY\nYOUR DIGITAL INSTRUMENT\nPlay a little.\n\nA moment for melody, whenever you need one.\n\nMAKE YOURSELF AT HOME\nNo experience necessary.\nSoft piano\nSynthesized keys · C4—C5\nSOUND ON\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\n♧\nClick the keys or use your keyboard to play\nONE OCTAVE / 13 KEYS\nA NOTE FOR YOU\n\nPlay one note at a time, or put a few together.\nThere’s no wrong way to begin.\n\nKEYBOARD MAPPING · C4 TO C5\nA W S E D F T G Y H U J K\nMADE FOR LITTLE MOMENTS\nIVORY · YOURS TO PLAY","images":"attached"}
thinking
**Evaluating action possibilities** I’m considering whether key action holding is feasible. It seems like motion for drag is set up to provide snapshots. Maybe I need to test dragging outside of the current context. I might want to explore how this affects the overall results. Let's see if there are alternative ways to approach this issue or if adjustments are needed. Keeping the user in mind, it’s important to ensure clarity and functionality.
{"action":"drag","x":405,"y":620,"toX":25,"toY":300,"text":"","delta":0}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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":"i\nIVORY\nA LITTLE SPACE TO PLAY\nYOUR DIGITAL INSTRUMENT\nPlay a little.\n\nA moment for melody, whenever you need one.\n\nMAKE YOURSELF AT HOME\nNo experience necessary.\nSoft piano\nSynthesized keys · C4—C5\nSOUND ON\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\n♧\nClick the keys or use your keyboard to play\nONE OCTAVE / 13 KEYS\nA NOTE FOR YOU\n\nPlay one note at a time, or put a few together.\nThere’s no wrong way to begin.\n\nKEYBOARD MAPPING · C4 TO C5\nA W S E D F T G Y H U J K\nMADE FOR LITTLE MOMENTS\nIVORY · YOURS TO PLAY","images":"attached"}
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{"path":"index.html","edits":[{"oldText":" if (!audioReady || sounding.has(note)) return;\n synth.triggerAttack(note);","newTeSuccessfully replaced 1 block(s) in index.html.
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{"action":"reload","x":0,"y":0,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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":"i\nIVORY\nA LITTLE SPACE TO PLAY\nYOUR DIGITAL INSTRUMENT\nPlay a little.\n\nA moment for melody, whenever you need one.\n\nMAKE YOURSELF AT HOME\nNo experience necessary.\nSoft piano\nSynthesized keys · C4—C5\nREADY TO PLAY\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\n♧\nClick the keys or use your keyboard to play\nONE OCTAVE / 13 KEYS\nA NOTE FOR YOU\n\nPlay one note at a time, or put a few together.\nThere’s no wrong way to begin.\n\nKEYBOARD MAPPING · C4 TO C5\nA W S E D F T G Y H U J K\nMADE FOR LITTLE MOMENTS\nIVORY · YOURS TO PLAY","images":"attached"}
{"action":"click","x":214,"y":520,"toX":0,"toY":0,"text":"","delta":0}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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":"i\nIVORY\nA LITTLE SPACE TO PLAY\nYOUR DIGITAL INSTRUMENT\nPlay a little.\n\nA moment for melody, whenever you need one.\n\nMAKE YOURSELF AT HOME\nNo experience necessary.\nSoft piano\nSynthesized keys · C4—C5\nSOUND ON\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\n♧\nClick the keys or use your keyboard to play\nONE OCTAVE / 13 KEYS\nA NOTE FOR YOU\n\nPlay one note at a time, or put a few together.\nThere’s no wrong way to begin.\n\nKEYBOARD MAPPING · C4 TO C5\nA W S E D F T G Y H U J K\nMADE FOR LITTLE MOMENTS\nIVORY · YOURS TO PLAY","images":"attached"}
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{"action":"key","x":0,"y":0,"toX":0,"toY":0,"text":"a","delta":0}Frame 1, +0ms
[Browser image supplied to model]
{"console":["log: %c * Tone.js v14.8.49 * background: #000; color: #fff","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":"i\nIVORY\nA LITTLE SPACE TO PLAY\nYOUR DIGITAL INSTRUMENT\nPlay a little.\n\nA moment for melody, whenever you need one.\n\nMAKE YOURSELF AT HOME\nNo experience necessary.\nSoft piano\nSynthesized keys · C4—C5\nSOUND ON\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\n♧\nClick the keys or use your keyboard to play\nONE OCTAVE / 13 KEYS\nA NOTE FOR YOU\n\nPlay one note at a time, or put a few together.\nThere’s no wrong way to begin.\n\nKEYBOARD MAPPING · C4 TO C5\nA W S E D F T G Y H U J K\nMADE FOR LITTLE MOMENTS\nIVORY · YOURS TO PLAY","images":"attached"}
thinking
Created `index.html`. Checked the note labels and mapping, mouse and keyboard input, release after dragging outside a key, and the console after audio activation. The console showed only initial autoplay warnings. Simultaneous notes, audible output, and highlighting during a held press remain unverified.