[pulseaudio-discuss] cracks and pops with intelHDA

Lennart Poettering lennart at poettering.net
Sat Jan 12 16:21:55 PST 2008

On Sat, 12.01.08 13:36, Ritesh Kumar (ritesh at cs.unc.edu) wrote:

> On Jan 12, 2008 6:35 AM, Erik Slagter <erik at slagter.name> wrote:
> > Ritesh Kumar wrote:
> >
> > > What was problem you wanted to solve... (network audio?). May be I can
> > help.
> >
> > I had posted here a few weeks ago. I have an amplifier with USB terminal
> > (and accompanying DAC) that removes the USB DAC (power down) when
> > powered down. This is a problem for me because I need to supply both the
> > amplifier and the internal soundcard with audio 24/7. When the amplifier
> > 's USB DAC goes away, the device is removed by alsa, which most programs
> > don't like. My thought was to use PulseAudio to solve this, but
> > PulseAudio does indeed notice that the USB DAC goes away, and actually
> > even re-enables it when it comes back, but never inserts it back into
> > the "combined" device.
> >
> > Now I've solved it using mpd (which can drive multiple outputs and
> > enable/disable these at well) and udev (to enable/disable the USB DAC in
> > mpd when powering up/down the amplifier). Works nicely.
> >
> This does seem to be something pulseaudio should do right... to bad that
> didn't work that well. I remember seeing a video of a demo of pulseaudio
> showing the connection and disconnection of an audio device and how a
> "send-to-all" virtual sink worked properly. However, the demo was with a GUI
> so I don't remember what commands could be given to pacmd to achieve the
> same effect.

The idea of module-combine is that it works without any special
commands or configuration. Just load it and you are set.

If that doesn't work properly, then you hit a bug.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net         ICQ# 11060553
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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