Arpeggiator pad · mistral-large-4-0

I wrote a first draft, but the stop logic is convoluted and buggy (the `findSeq` hack). Let me clean that up before testing.

Initial render looks good. The console shows a CSP error about a worker from blob — that's Tone.js's worklet/audio-worklet attempt being blocked by the sandbox CSP. Tone.js 14.8.49 uses AudioWorklet; if blocked, it should fall back. But the error "Creating a worker from 'blob:...' violates CSP worker-src 'none'" might break scheduling. Let me click a pad and check whether audio actually initializes and whether the arpeggiator schedules without errors. Let me click pad C4 first.

The click didn't seem to register on the pad — the pad didn't get the active class, and no new console messages. Maybe the click coordinates hit the button but the screenshot was taken at +0ms before the class was applied, or the click missed. The pad button spans roughly x=365..565, y=283..368. I clicked (465, 325) which should be inside. But the screenshot shows no active state. The active class lasts 450ms; screenshot at +0ms should show it. Hmm, maybe the click landed but the class was applied and removed... no, 450ms. Wait — maybe the click did register but the screenshot is taken after some delay. Let me click again and take a screenshot quickly, or better, use inspect after a short wait. Actually the tool returns "Frame 1, +0ms" — the screenshot may be captured at a moment. Let me click and then inspect DOM to check for pad-active class. Actually, a concern: the CSP error about worker-src 'none' — Tone.js 14.8.49 loads AudioWorklet modules via blob workers. If blocked, Tone may fail to create nodes... Actually Tone.js 14 uses AudioWorkletNode for some things but the core synth uses ScriptProcessor fallback? In Tone 14, `Tone.Synth` uses oscillators which are native AudioNodes (OscillatorNode), not worklets. The worklet is used for things like the Transport clock? Actually Tone 14.8 uses a worklet-based clock ("ToneAudioWorklet"?). Hmm, Tone.js 14.8 introduced `Tone.getContext()` with worklet for the clock — the "worker from blob" error might be the AudioWorklet loading. If the worklet fails, Tone falls back to a ScriptProcessorNode-based clock (with a warning). The console doesn't show a fallback error yet. Let me click the pad and check the DOM state and console more carefully. I'll click, then inspect.

The clicks don't seem to be registering — no active pad, no console changes, and the "AudioContext was not allowed to start" warnings persist (meaning Tone.start() hasn't been called, i.e., my click handler isn't firing). Possibly the click coordinates are off, or the click is landing but the screenshot is taken before... but the inspect also shows no change. Wait — maybe the click IS landing on the button but the handler runs `initAudio()` then `Tone.start().then(...)`. The warnings "AudioContext was not allowed to start" appear twice at load — those are from creating the context at load time? Actually I create nodes lazily, so no context at load... Hmm, but Tone.js creates a global context on load (Tone.getContext() creates the AudioContext when the library loads). That explains the two warnings at load. But after clicking, no new console messages and no active class. So the click handler isn't firing. Maybe the click coordinates (465, 325) — the screenshot is 1200x800 but the actual rendered page might be scaled? The image shows the pad at around x=465, y=325 in the 1200x800 image. That should be right. Hmm, maybe the browser tool's click dispatches at viewport coordinates but the page is inside an iframe that's scaled/offset. The inspect DOM text doesn't show class changes though. Let me try clicking the Play button instead and see if anything changes. Or maybe clicks need to be on exact element centers. Let me compute: pad 1 button in the image spans roughly x=365..565, y=283..368. Center ≈ (465, 325). That's what I clicked. Alternatively, maybe the click did fire but `markActive` was called and then removed after 450ms, and the screenshot/inspect happened later than 450ms after the click. The tool says "Frame 1, +0ms" but there may be latency between the click action and the screenshot. The console would still show new messages though — e.g., if Tone.start() resolved, no message; if it failed, an error. Actually no console message is expected on success! The only expected console change on success is... nothing. And the active class lasts 450ms which may have expired by the time of the screenshot. So the click may actually be working. The "AudioContext was not allowed to start" warnings at load are from Tone creating the context before gesture; after the click, Tone.start() resumes it — no new warning. That's consistent. To verify the active feedback, I should click and screenshot immediately — but the tool seems to capture after some delay. Alternative: verify via DOM inspection right after click. The inspect also showed no pad-active class... but again, timing. Better approach: use the `key` action? No. Let me instead check the audio state: after clicking a pad, check `Tone.context.state` via... I can't run arbitrary JS with these tools directly. Hmm, the browser tool only does actions. Alternative: I can add a temporary visible indicator that persists, e.g., a "last played note" readout in the status line that updates on pad click and on each arpeggiator step. That makes verification visible in screenshots and is also genuinely useful UI. Let me add: status shows "Last note: C4" and during arpeggio shows the current step note. Actually the status already updates during playback with selection; I can add a "last played" element. Also, to verify scheduling works despite the CSP worker error, I can add a step counter display: "Step: N" incrementing each eighth note. If the arpeggiator runs, the counter increments — visible proof of scheduling. And "Last note" updates each step. Let me also reconsider the CSP worker error: Tone.js 14.8.49 — the blob worker is likely for the AudioWorklet (Tone 14.8 uses worklets for some nodes). If worklet loading fails, Tone falls back. The error appears once at load. Since the synth uses OscillatorNode (native), audio should still work. The Transport clock in Tone 14.8 uses... `Tone.Transport` uses the context's clock which in 14.8 might use a worklet-based clock with ScriptProcessor fallback. If the fallback also fails, scheduling breaks. The step counter will tell us. Let me add the debug/UX readouts: - A "now playing" indicator: last note + a step counter. I'll modify updateStatus to include last note, and add a `nowEl` showing the most recent note triggered (with a brief highlight). Also increment a visible step counter during playback. Let me edit the file.