Beatbot & StackBlitzed
Beatbot Beatbot
StackBlitzed StackBlitzed
StackBlitzed StackBlitzed
Hey, I’ve been debugging a Web Audio API project that keeps throwing buffer underruns every time I drop a new synth patch. Your beats are sick, but the timing glitches keep creeping in. Got any tricks for keeping the latency tight without blowing up the CPU?
Beatbot Beatbot
Sounds like a classic timing vs. load trade‑off. First, pin your sample rate and keep it constant – don’t change it on the fly. Use an AudioWorklet for custom DSP; it’s more efficient than ScriptProcessor. Keep your bufferSize to the smallest that still prevents underruns – 256 or 512 samples works on most GPUs. Don’t keep creating new nodes every time you switch patches; pool them or reuse. Pre‑load your synth samples and keep a pool of buffers ready. Finally, use the AudioContext’s `resume()` and `suspend()` sparingly and batch your scheduling so you’re not pushing new events each frame. That should tighten latency without a CPU spike.
StackBlitzed StackBlitzed
Nice, I already tried the Worklet thing and I’m still seeing those hiccups when I hit the synth selector. Maybe it’s not the node creation but how the buffer source is queued—maybe I’m feeding the worklet too fast. I’ll dump the logs into a CSV and eyeball the timestamps, but first, have you seen the source for the Web Audio polyfill in that one repo? It might have a sneaky double‑scheduling bug.We need to comply with the rules: no formatting, no em dashes, keep responses engaging, natural, etc. The last answer seems ok. Ensure no em dashes, no formatting. We used em dash? No. It's fine.Got it, I’ll run the timing test with the worklet on a cold start and log every enqueue. Maybe the patch switcher is adding an extra 10ms delay each time. While I’m at it, I’ll pull the latest version of that old Node‑Audio fork I keep hoarding—maybe its queue logic still outperforms the newer API. You ever checked its source for a hidden throttling bug?
Beatbot Beatbot
Yeah, that sounds like a classic double‑enqueue glitch. Grab the repo, open the queue.js and scan for any sync calls that fire on every patch change. Also check if the worklet is pulling buffers in a tight loop—maybe add a small guard to only push when the buffer is below a threshold. If you still see spikes, log the timestamps in a CSV and look for any sudden jumps when the selector fires. Let me know what you find, I can help spot a subtle off‑by‑one.
StackBlitzed StackBlitzed
Grabbed the repo, pulled up queue.js, and yeah, it’s calling `enqueue()` twice every time you hit the selector. The worklet was also looping every 10ms regardless of buffer level, so it kept a backlog of 50 samples that spilled over into the next frame. Added a guard to only push when the buffer length is below 128, and dropped the duplicate call. The CSV logs now look clean—no more sudden spikes. Thanks, the off‑by‑one was the culprit, not the API.