Osprey 230 - no audio

Greetings!

I have an Osprey 230 capture card that is giving me fits. I have video working from it without issue but can't for the life of me get any audio from it at all.

I am working from Slackware 12 and kernel 2.6.26.5.

I have checked that sound is going to the card (verified by connecting headphones directly to the audio cable).

While audio is going to the card, I have ran the following command: sox -w -r 48000 -t ossdsp /dev/dsp1 -t wav try.wav - this gives me a wav file with no audio.

dmesg shows nothing wrong at all. Module insertion (snd-bt87x) creates the device nodes without issue.

output from amixer -c 1:

ron@video:/root/vlc/vlc-0.9.2$ amixer -c 1
Simple mixer control 'FM',0
  Capabilities: cswitch cswitch-joined cswitch-exclusive
  Capture exclusive group: 0
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'Mic/Line',0
  Capabilities: cswitch cswitch-joined cswitch-exclusive
  Capture exclusive group: 0
  Capture channels: Mono
  Mono: Capture [off]
Simple mixer control 'Capture',0
  Capabilities: cvolume
  Capture channels: Mono
  Limits: Capture 0 - 15
  Mono: Capture 0 [0%]
Simple mixer control 'Capture Boost',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [off]
Simple mixer control 'TV Tuner',0
  Capabilities: cswitch cswitch-joined cswitch-exclusive
  Capture exclusive group: 0
  Capture channels: Mono
  Mono: Capture [on]
ron@video:/root/vlc/vlc-0.9.2$

Setting the capture control to 100% does nothing - still no sound out.

Does anyone have any ideas on what to try here?

Thanks!

Ron

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