On Tue, 2017-09-19 at 19:07 +0930, Steven Wawryk wrote: > Hello, > > I'm trying to work out how to control latency with pulseaudio CLI scripts. > > We're finding that latency varies between a few seconds to about 80 seconds. > > We have a system which uses a dedicated embedded board for many channels > of audio I/O. Workstations > connect with the I/O board using RTP over a network. > > Pulseaudio 8.0 is used on both I/O board and workstation platforms, both > using pulseaudio CLI scripts. > Modules explicitly loaded include instances of module-rtp-send, > module-rtp-recv, module-null-sink, > module-remap-source, module-remap-sink and module-loopback. > > This all works as far as it goes, but with VoIP (using 1 channel in each > direction), we're finding > that the latencies make it pretty much unusable. Ideally, I need to be > able to put a reasonable > upper limit on total latency. > > The link > https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Clients/LatencyControl/ > provides instructions for use with the API, but I can't find much about > controlling latency with CLI. > A few modules appear to have latency-related parameters I can tweak, but > this seems to be pointless > because other modules are adding latency that I haven't worked out how > to control. > > Is there any way to do this? If you're seeing 80 second latencies, I think the only place in which that amount could accumulate is module-loopback. PulseAudio 11.0 has a big improvement in the module-loopback latency regulation, so I recommend upgrading. -- Tanu https://www.patreon.com/tanuk
