Re: Loopback latency issue
Jan Stary <[email protected]>
| Newsgroups | gmane.comp.audio.sox |
|---|---|
| Message-ID | <[email protected]> |
On Jul 10 20:40:09, [email protected] wrote: > We are trying to build a Sox based real-time sound altering app, and we’ve got everything working on our LUbuntu 16.04 stations except for an issue w latency. > > When we test it on actual hardware, we are having a latency of about 2 seconds, when we test it on our virtual machine the latency is more like 250ms. > > sox -t pusleaudio default -t pulseaudio null pitch n I don't use pulseaudio, but I assume that "default" and "null" are names of pulseaudio (pseudo)devices. How can you tell the delay when writing to a null device? (If that means what I think it means: dropping the pulseaudio, would it be what sox -d -n does?) I just tried sox -d -d pitch 1000 an OpenBSD current/amd64, and there is indeed about a half second of delay. > Whenever we add the null loopback or aloop, we experience a delay. I don't understand: what does your application do that you need to "add a null loopback"? On Jul 11 14:12:13, [email protected] wrote: > Some effects have additional internal buffers. It seems there is a delay even when just playing default input to default output; even without the effects: sox -d -d (So I don't think it's the effect processing that introduces the delay.) Jan _______________________________________________ Sox-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sox-users