On Tue, May 22, 2018 at 07:56:31AM +0200, Alexandre Ratchov wrote: > On Sun, May 20, 2018 at 06:49:25PM -0400, Ken M wrote: > > Been looking around and can't find the answer to this question. If I missed > > it > > in some obvious place please excuse me. > > > > Anyway I am curious if sndio can support multiple simultaneous cards, either > > identical or different, particularly multiple standards compliant USB audio > > interfaces. Basically I am asking if it supports similar features to what > > one > > might use zita with jack on a linux system. > > This doesn't work with sndio. It's difficult to make work because each > audio interface would use its own clock source, and clocks would drift > sooner or later. Drift may be corrected, but this would cost > additional latency, complexity and (probably) quality problems. > > That's why certain devices have a "word clock", to allow audio devices > to by synchronized; OpenBSD doesn't support any of them, but > supporting them looks much easier than combining multiple devices. > > Nowadays many-channel devices are common, so supporting multiple cards > as one isn't that important, is it?
OK, noted. The question was about a feature parity against a library in linux. Zita is a tool to help overcome the clock drift. Truth is in practice it is less than reliable so a single interface is better in practice. Thank you. Ken
