Drum machine · muse-wonder
Output generated Cost / run $1.4342 Runtime 175.8s
Prompt for this run
Build a 16-step drum sequencer using the Web Audio API. 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. No third-party libraries are provided. Required behavior: - Show four labeled rows for kick, snare, hi-hat, and clap, each with 16 independently toggleable steps. Start with a simple audible pattern. - Treat the 16 steps as one bar of sixteenth notes in 4/4 time. Provide Play, Stop, Clear, and a BPM control from 60 to 180. - During playback, highlight the current step and synthesize the enabled drum voices. Editing steps or BPM must affect playback without creating duplicate sequences. - Stop cancels future hits and resets the playhead to the first step. Clear disables all steps. Starting again uses the currently displayed pattern. - Unlock audio through a user gesture and synthesize distinct percussion sounds from oscillators/noise and envelopes; do not load audio files. Verify: Toggle a step and start playback. Check that the playhead advances across the grid and responds to a BPM change. Stop and start again, checking that the displayed pattern is retained and the playhead restarts from the first step.
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 · 47 messages
Build a 16-step drum sequencer using the Web Audio API. 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. No third-party libraries are provided. Required behavior: - Show four labeled rows for kick, snare, hi-hat, and clap, each with 16 independently toggleable steps. Start with a simple audible pattern. - Treat the 16 steps as one bar of sixteenth notes in 4/4 time. Provide Play, Stop, Clear, and a BPM control from 60 to 180. - During playback, highlight the current step and synthesize the enabled drum voices. Editing steps or BPM must affect playback without creating duplicate sequences. - Stop cancels future hits and resets the playhead to the first step. Clear disables all steps. Starting again uses the currently displayed pattern. - Unlock audio through a user gesture and synthesize distinct percussion sounds from oscillators/noise and envelopes; do not load audio files. Verify: Toggle a step and start playback. Check that the playhead advances across the grid and responds to a BPM change. Stop and start again, checking that the displayed pattern is retained and the playhead restarts from the first step.
thinking
Designing a single-page Web Audio API drum sequencer with 4-row 16-step grid, BPM control, playback highlighting, and user-gesture audio unlock.Adding a lookahead scheduler with interval timing, source tracking for cancellation, and a draw queue for playhead sync.
index.html (19638 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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nSTOPPED\n·\nSTEP 1 / 16\n▶ PLAY\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":283,"y":291}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nSTOPPED\n·\nSTEP 1 / 16\n▶ PLAY\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":149,"y":137}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 1 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"motion"}Frame 1, +0ms
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Frame 2, +620ms
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Frame 3, +1226ms
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Frame 4, +1825ms
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{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 11 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":1026,"y":137}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 16 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"drag","x":873,"y":138,"toX":965,"toY":138}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 2 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":970,"y":138}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 8 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":873,"y":138}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 14 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"key","text":"ArrowRight"}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 4 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":1026,"y":137}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 2 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
{"action":"type","text":"180"}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 7 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
Debugging a failed number input type action by checking focus, coordinates, and alternative verification methods.
{"action":"inspect"}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 9 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"key","text":"Tab"}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 11 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"key","text":"ArrowRight"}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 7 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"key","text":"End"}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 4 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":267,"y":137}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nSTOPPED\n·\nSTEP 1 / 16\n▶ PLAY\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":149,"y":137}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nPLAYING\n·\nSTEP 1 / 16\n▶ PLAYING\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":267,"y":137}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nSTOPPED\n·\nSTEP 1 / 16\n▶ PLAY\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
{"action":"click","x":371,"y":137}Frame 1, +1ms
[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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nSTOPPED\n·\nSTEP 1 / 16\n▶ PLAY\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
{"action":"click","x":372,"y":138}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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nSTOPPED\n·\nSTEP 1 / 16\n▶ PLAY\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
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."],"dom":"STEP//16\nDRUM SEQUENCER · WEB AUDIO\nSTOPPED\n·\nSTEP 1 / 16\n▶ PLAY\n■ STOP\nCLEAR\nTEMPO\nBPM\nTIME 4/4\nBAR 16 × 16TH NOTES\nENGINE OSC + NOISE · NO SAMPLES\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\nKICK\nsine drop\nSNARE\nnoise + body\nHI-HAT\nfiltered noise\nCLAP\nburst noise\n\nClick any pad to toggle it — edits apply live while playing. Drag the tempo or type a BPM (60–180) and the groove follows without restarting. Press Space to play / stop.\n\n↺ RESTORE GROOVE\n+ HATS\n\nAll sounds are synthesized in your browser with oscillators, filtered noise and envelopes. No audio files are loaded.","images":"attached"}
thinking
Built `index.html` — a self-contained 16-step drum sequencer (no external assets/CDNs). **Features:** - 4 labeled rows (Kick, Snare, Hi-Hat, Clap) × 16 independently toggleable steps, pre-loaded with a four-on-the-floor groove (kick 1/5/9/13, snare 5/13, hats on 8ths, clap accents) - One bar of 16th notes in 4/4; Play, Stop, Clear, and BPM slider + numeric input clamped/synced at 60–180 (default 120) - Lookahead Web Audio scheduler (25 ms interval, ~120 ms look-ahead) that reads the live pattern and current BPM each step — edits and tempo changes apply mid-playback with a single scheduler, so no duplicate sequences - Stop clears the scheduler, stops tracked scheduled sources, and resets the playhead to Step 1; Clear empties the grid; restarting replays the displayed pattern from step 1 - All sounds synthesized from oscillators/noise with pitch & gain envelopes (sine-drop kick, noise+body snare, high-passed hat, burst-envelope clap) — no audio files; AudioContext created/resumed on user gesture, plus pad audition on toggle and Spacebar transport **Browser-verified:** - Toggling a pad (Kick step 2) lit it and retained it across playback - Playhead highlighted each column and advanced Step 1→16 and looped (motion frames showed steps 1, 6, 11, 12…) - BPM changed 120→121→180 via slider keyboard control while playing, playback continued without restarting - Stop reset the display to "STEP 1 / 16"; restarting began at Step 1 with the edited pattern intact - Clear emptied all four rows; reload restored the default groove at 120 BPM; no console errors (only the sandbox iframe warning) **Unverified:** actual audible output/timbre (can't hear audio in the sandbox) — synthesis was confirmed only by code path execution without errors.