Arpeggiator pad · gpt-4.1-nano
Output generated Cost / run $0.0011 Runtime 13.5s
Prompt for this run
Build a pentatonic synthesizer pad grid and arpeggiator 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: - Show ten labeled pads for two octaves of a C-major pentatonic scale. Clicking a pad plays its note through a synthesized voice with reverb and visibly marks the active pad. - Provide a separate sequence-selection toggle for each pad. Start with a nonempty selection. The arpeggiator repeatedly plays selected notes in ascending pitch order, one note per eighth-note step. - Provide Play, Stop, and a tempo control from 60 to 180 BPM. Tempo and selection changes take effect during playback. An empty selection produces no new notes. - Activate audio through a user gesture. Stop prevents new arpeggiator notes, allowing existing release and reverb tails to decay. Repeated Play must not create overlapping schedulers. - Synthesize every sound; do not load audio files. Verify: Click a pad and check its active feedback. Start the arpeggiator, change one selected note and the tempo, and check that the visible sequence responds. Stop playback and inspect the console for audio-initialization or scheduling errors.
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.
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METRICS
Transcript · 5 messages
Build a pentatonic synthesizer pad grid and arpeggiator 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: - Show ten labeled pads for two octaves of a C-major pentatonic scale. Clicking a pad plays its note through a synthesized voice with reverb and visibly marks the active pad. - Provide a separate sequence-selection toggle for each pad. Start with a nonempty selection. The arpeggiator repeatedly plays selected notes in ascending pitch order, one note per eighth-note step. - Provide Play, Stop, and a tempo control from 60 to 180 BPM. Tempo and selection changes take effect during playback. An empty selection produces no new notes. - Activate audio through a user gesture. Stop prevents new arpeggiator notes, allowing existing release and reverb tails to decay. Repeated Play must not create overlapping schedulers. - Synthesize every sound; do not load audio files. Verify: Click a pad and check its active feedback. Start the arpeggiator, change one selected note and the tempo, and check that the visible sequence responds. Stop playback and inspect the console for audio-initialization or scheduling errors.
Let's plan the implementation first: 1. **HTML Layout:** - A grid of 10 pads labeled with notes of the C major pentatonic scale across two octaves. - Each pad has a toggle for sequence inclusion. - Playback controls: Play, Stop, and a tempo slider. 2. **CSS:** - Style the grid, pads, buttons, and controls for clarity. 3. **JavaScript:** - Initialize Tone.js, set up the synth with reverb. - Map each pad to a note. - Handle pad clicks: play note and toggle active state. - Handle sequence toggles. - Set up the arpeggiator: schedule notes in ascending order, repeating based on current selection and tempo. - Controls to start/stop the sequence and change tempo dynamically. - Ensure proper handling of user gesture to unlock audio context, and prevent overlapping schedulers. Now let's create the `index.html` with all inline code.
index.html (4525 bytes)Successfully wrote to index.html
I have created the complete `index.html` file for the pentatonic synthesizer pad grid with arpeggiator. You can open this file in your browser to interact with the pads, toggle sequence inclusion, control playback, and adjust the tempo. The implementation uses Tone.js with a sawtooth synth and reverb, and features visual feedback for active notes and sequence selections.