Greetings list,

I have managed to get my Creative Extigy card to work using alsa and
playback with ogg123 etc works fine.

Now I would like to be able to record using the Extigy which is connected to
my audio setup using an optical cable.

I used the "amixer" tool to see what channel was selected for capture.

The first thing I noticed the "Digital In" is only mono, is this right???

The other thing I noticed is I have two masters, master0 and master1, which
also strikes me as a bit strange.

Here is the output from "amixer contents"


// snip


numid=15,iface=MIXER,name='Master Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on
numid=16,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw---,values=6,min=0,max=200,step=0
  : values=152,152,152,152,152,152
numid=17,iface=MIXER,name='Master Playback Volume',index=1
  ; type=INTEGER,access=rw---,values=1,min=0,max=200,step=0
  : values=152
numid=18,iface=MIXER,name='Tone Control - Bass'
  ; type=INTEGER,access=rw---,values=1,min=0,max=96,step=0
  : values=48
numid=19,iface=MIXER,name='Tone Control - Treble'
  ; type=INTEGER,access=rw---,values=1,min=0,max=96,step=0
  : values=48
numid=1,iface=MIXER,name='PCM Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on
numid=2,iface=MIXER,name='PCM Playback Volume'
  ; type=INTEGER,access=rw---,values=1,min=0,max=200,step=0
  : values=200
numid=5,iface=MIXER,name='Line Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=off
numid=6,iface=MIXER,name='Line Playback Volume'
  ; type=INTEGER,access=rw---,values=2,min=0,max=200,step=0
  : values=200,200
numid=7,iface=MIXER,name='Line Playback Volume',index=1
  ; type=INTEGER,access=rw---,values=1,min=0,max=200,step=0
  : values=200
numid=9,iface=MIXER,name='Mic Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=off
numid=10,iface=MIXER,name='Mic Playback Volume'
  ; type=INTEGER,access=rw---,values=1,min=0,max=200,step=0
  : values=200
numid=12,iface=MIXER,name='Capture Input Source'
  ; type=ENUMERATED,access=rw---,values=1,items=3
  ; Item #0 'Input 0'
  ; Item #1 'Mic'
  ; Item #2 'Mixer'
  : values=0
numid=13,iface=MIXER,name='Capture Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on
numid=14,iface=MIXER,name='Capture Volume'
  ; type=INTEGER,access=rw---,values=1,min=0,max=200,step=0
  : values=200
numid=23,iface=MIXER,name='IEC958 Optical Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on
numid=8,iface=MIXER,name='3D Stereo Extender Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=off
numid=11,iface=MIXER,name='Channel Routing Mode Select'
  ; type=INTEGER,access=rw---,values=1,min=0,max=6,step=0
  : values=6
numid=3,iface=MIXER,name='Digital In Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on
numid=4,iface=MIXER,name='Digital In Volume'
  ; type=INTEGER,access=rw---,values=1,min=0,max=200,step=0
  : values=200
numid=21,iface=MIXER,name='Digital Out Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on
numid=22,iface=MIXER,name='Digital Out1 Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on
numid=20,iface=MIXER,name='Speaker Playback Switch'
  ; type=BOOLEAN,access=rw---,values=1
  : values=on

// snip


Firstly, does this output look right.

Secondly, why is the digital input only mono.

And finally how do I tell Alsa which input to use for capture?


Just as a reference, I am using Alsa 0.9.6 compiled from source, on a Gentoo
system running Kernel 2.4.22 patched with grsecurity.

Any suggestions greatly appreciated.

>From Mitchell



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