BT87x card - audio not working

Greetings:

I have a BT878 based capture card that is working wonderfully, except for audio. The card is an Osprey 230 from Viewcast. The card is supposed to support digital audio input - no need for a loopback cable from the card to the PC's line in.

The card is registering the audio device with the ALSA subsystem but no matter what I try, I can not get audio from the card into the PC. I know that audio is going to the card as I have checked the signal presence at the input cable.

Kernel is 2.6.26.5 generic with no additional patches. OS is Slackware 12.

The card is showing up in /proc/asound:

root@video:/proc/asound# cat devices
 1:        : sequencer
32: [ 1]   : control
33:        : timer
56: [ 1- 0]: digital audio capture
57: [ 1- 1]: digital audio capture
root@video:/proc/asound#
root@video:/proc/asound/card1# cat id
Bt878
root@video:/proc/asound/card1/pcm0c# cat info
card: 1
device: 0
subdevice: 0
stream: CAPTURE
id: Bt87x Digital
name: Bt87x Digital
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1
root@video:/proc/asound/card1/pcm0c#

Can anyone provide any clues here?

Thanks!

Ron Gage

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