Greetings. I've been struggling with PulseAudio for a couple of weeks. It
looks cool but odd things don't work, or I don't understand how to do them.
1. Using pacmd I try to play a file:
>>> list-sinks
1 sink(s) available.
* index: 0
name: <beeps>
driver: <modules/module-alsa-sink.c>
volume: <0: 100% 1: 100%>
latency: <61405 usec>
monitor_source: <0>
sample spec: <s16le 2ch 44100Hz>
channel map: <front-left,front-right>
owner module: <0>
description: <ALSA PCM on dsp0 (dmix0)>
>>> play-file /var/tmp/blueriver.wav beeps
No sink by that name.
>>> play-file /var/tmp/blueriver.wav 0
No sink by that name.
2. Unable to set the volume of a sink:
>>> set-sink-volume beeps 32768
Failed to parse volume.
>>> set-sink-volume beeps 50%
Failed to parse volume.
There are no examples of the commands in the docs, so perhaps I need a comma,
quotes or parentheses?
3. The big problem I have is that I want to have multiple audio sinks mapped
to a single ALSA sound card: beeps, speech and jukebox, and I'd like to set
the volume for each differently (the beeps i.e. desktop sound effects are too
loud, but I don't want to turn down the volume across all sinks).
When I try to use pavucontrol, the "sinks" tab is empty (?) and the "streams"
tab only has things on it while they are playing. For desktop sounds, this is
a very short time and I cannot move the mouse and adjust the volume in the
fraction of a second it plays. The desktop sounds are coming in via the
esound protocol, from the Enlightenment window manager.
When I use module-volume-restore, it doesn't write a record to
~/.pulse/volume.table for every desktop sound event, only for those things
where I actually managed to change the volume (music and speech). Also it
seems it writes _very specific_ names in those cases, such that you're setting
the volume for a particular sound and not like all desktop beeps. I really
need a volume control on the sink itself.
4. There seems to be no way to grab and control the merged output from Pulse
Audio. For example in my case with the three sinks, I'd like to also control
the volume of the trio as one merged sink. I can do so by changing the volume
in the underlying ALSA device to which they all flow, using ALSA tools, but
it seems odd that PulseAudio doesn't provide a mechanism. I've played with
null sinks, *.monitor outputs and such trying to map the pipes to achieve it,
but failed.
5. Not really within the domain of this list, but we really need to get the
latest Pulse Audio software into the Gentoo ebuilds, for x86 usage. Many of
the cool utilities aren't in there yet.
Thanks and PulseAudio looks neat. After reviewing all the other sound
subsystems for Linux, I've come to the conclusion that PulseAudio has the
flexibility, performance/low-latency and feature set (RTP/SDP/RTSP/Rendevous)
to become the standard.
-Jeff
