Hi Atte!
Across the various systems, buffer size of 128 (srate 44100) can translate to somewhere between 10-50ms of audio latency, I reckon.
Ok. But can't anything be said about a chuck-only latency?
I actually meant the earlier estimate to pertain solely to chuck (though it probably applies to other audio applications too). Running chuck across quite a few machines lately (plork powerbooks, windows machines, and sometimes linux), latency has seemed consistently inconsistent depending on the system.
If it makes it easier to answer, I'm running chuck under debian/linux with realtime patched kernel (alsa only, no oss, no jack) and either a crappy (=noise) onboard i810 or edirol ua-1a usb soundcard. My computer is a P4 2.4G laptop with 512Mb RAM.
It's hard to say (at least for me) - much depends on your sound card's latency. ALSA, as far as I know, affords low latency. Which latency are you concerned with? external MIDI/OSC events or audio I/O latency? or something else? Sorry I can't provide a more precise answer. Perhaps others here can? Best, Ge!