On Mon, 09.03.09 14:34, Sean McNamara (smcnam at gmail.com) wrote: > As explained in the readme file: > > 1. The purpose of the "device" parameter is somewhat of a mis-nomer > :) Is that so? > 2. If you are specifying the "device" parameter to an ALSA PCM (a > playback stream), it is equivalent to specifying a PulseAudio sink. No. Can be both a sink and a source. > 3. If you are specifying the "device" parameter to an ALSA CTL (a > capture stream), it is equivalent to specifying a PulseAudio source. No. Alsa ctl devices are 'control' devices, i.e. mixers and stuff. > PA sinks and sources are uniquely qualified by index and by name. The > name usually doesn't (shouldn't?) change between boot-ups, whether or > not HAL initializes your device in one order or another. However, we > can't rely on the stability of sink/source indexes in PA at all. > > Fortunately, we specify devices by their sink/source name in this configuration. > > If you want to make a static configuration in /etc/pulse/default.pa > that will let you have stable mappings between sink names and > ALSA<->Pulse PCMs, you can do this (illustrative example, but using > this verbatim won't get you a working config): Uh? module-hal-detect gives you stable mappings anyway. > In /etc/pulse/default.pa: > 1. Comment out module-hal-detect > 2. Add > > load-module module-alsa-sink device=hw:0 sink_name=foo > load-module module-alsa-source device=hw:0 source_name=bar Everytime someone uses "hw:0" or "hw:0,0" as ALSA device strings I kill a kitten. Promised. Use "front:0" or suchlike. Using hw: makes no sense in 99% of all cases. Generally, PA sink/source names should be perfectly stable. ALSA device indexes and PA sink/source indexes are not stable Don't rely on them. It is usually a better idea to simply make use of PA's save/restore stream device feature instead of losing yourself in weird configuration files. If an application connects to the wrong device simply fire up pavucontrol and move it to right device and then PA will remember. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4
