Clone Audio between onboard card and USB adapter

Neil Sutton <swift_gti@xxxxxxx> · Thu, 1 Oct 2009 00:11:14 +0100

Hi All,

I'm currently trying to setup Alsa so that it clones all the audio sent to my default soundcard (just bog standard onboard connected via headphone jack) and duplicates the output to a USB soundcard.

I checked out the documentation for the asoundrc config but it's not making too much sense, the 'copy' plugin example seems way more complex than what i'm looking for.

Currently I've got this, but i'm only getting audio output from the default onboard card..

pcm.!default {
        type plug
        slave.pcm "dup"
}
pcm.dup {
        type copy
        slave.pcm "hw:0,0"
        slave.pcm "hw:1,0"
}
Here is the output of aplay -l (the first device is my default, the last is the one I want to clone to)

**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: ALC662 Analog [ALC662 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 3: NVIDIA HDMI [NVIDIA HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Audio [USB Audio], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
Can anyone spot where I've gone wrong ?

Many Thanks! 		 	   		  
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