@chembot anything less than 1ms is going to be running up against limitations of the browser itself. iirc that’s the range where browsers start messing with things to avoid fingerprinting via high precision timestamps. I know firefox limits precision to 2ms
that being said, i’ve been playing around with adding some new experimental audio features that might help you out with this; specifically, wavetable synthesis which could probably be expanded to playing PCM buffers.
below is a demo link, but this is made with a beta version of the editor so please be sure to open it in an incognito window to avoid messing with your projects. also, this might not ship anytime soon so don’t do too much with it! very much subject to change