[pulseaudio-discuss] Pulseaudio recording device re-direct from local machine over cable broadband to remote server / "latency" problem

Maarten Bosmans mkbosmans at gmail.com
Sun Apr 17 13:23:49 PDT 2011

2011/4/17 Sean McNamara <smcnam at gmail.com>:
> I don't know if pulseaudio supports any kind of protocol compression these
> days, but traditionally it does not. And due to that, it is generally
> unsuitable for use over the public internet. Lossy compression such as mp3,
> and protocols such as RTP and Icecast, exist for this purpose. Even if both
> nodes are dedicated servers with symmetric 100mbps, your transport latency
> over the internet is too high for most uses of PA.

Indeed, it is still the case that only raw PCM audio streaming is
supported. For CD quality audio this means a 44100Hz x 16bit x 2ch =
1.4 Mbit/s bandwidth requirement.

> I've heard about lots of interest in extending the PA protocol to support
> lossy, non-PCM formats, but I don't *think* that has been added quite yet.

The CELT codec would be the best candidate for that, as it is
specifically designed for low-latency requirements.


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