ice1712 docs

ice1712 docs

[Julian Cable]

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Hi,

  I got a php error submitting this to the driver page so here is the
text in case it got lost:

This is what I've found in discussions with Takashi Iwai at SuSE:

Due to peculiarities of the ICE1712 chip there is a problem using
the kernel OSS support. OSS applications can only use one stereo
channel, which for most cards would not be the IEC958 channel.

If you want to use OSS and have access to all the channels then the
aoss user level OSS emulation is more flexible as it lets the
libasound stuff do its thing. This needs normal dynamically linked
applications and will not work on closed source statically linked
applications.

The aoss "trick" works by defining pcm.dsp<n> alsa devices and then
calling the program with the following:

% aoss your-own-app
 
For example, for a VX442 (2 stereo analog and 1 stereo IEC958),
define the following in ~/.asoundrc or /etc/asound.conf:
 
pcm.dsp0 {
  type plug
   slave.pcm "front"
} 
 
pcm.dsp1 {
    type route
    ttable.0.2 1
    ttable.1.3 1
   slave.pcm {
      type hw
      card 0
  }
} 
 
pcm.dsp2 {
  type plug
  slave.pcm "iec958"
}


Julian Cable
Project Manager, Transmission & Distribution, BBC World Service
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Re: ice1712 docs

[Dirk Jagdmann]

Hello Julian,
>   I got a php error submitting this to the driver page so here is the 
> text in case it got lost:

I was able to include your config here:
http://alsa.opensrc.org/index.php?page=1712+.asoundrc

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