Bttv and composite audio

I have a ATV-TUNER-F tv card.
This is the manufacturer web site: http://advanteknetworks.com/products/tvtuners/atvtunerf.html

Here is some info of the card:

lspci -v
02:0a.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
Flags: bus master, medium devsel, latency 64, IRQ 21
Memory at faffe000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Kernel driver in use: bttv
Kernel modules: bttv

02:0a.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
Flags: bus master, medium devsel, latency 64, IRQ 3
Memory at fafff000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2

cat /etc/modprobe.d/bttv
options bttv card=38 tuner=43 radio=1 pll=1

uname -r
3.0-ARCH

dmesg | grep bttv

[27086.701904] bttv: driver version 0.9.18 loaded
[27086.701909] bttv: using 8 buffers with 2080k (520 pages) each for capture
[27086.702544] bttv: Bt8xx card found (0).
[27086.702566] bttv0: Bt878 (rev 17) at 0000:02:0a.0, irq: 21, latency: 64, mmio: 0xfaffe000
[27086.702614] bttv0: using: Askey CPH06X TView99 [card=38,insmod option]
[27086.702658] bttv0: gpio: en=00000000, out=00000000 in=00f9807f [init]
[27086.703500] bttv0: tuner type=43
[27086.729122] bttv0: audio absent, no audio device found!
[27086.748110] bttv0: registered device video0
[27086.748286] bttv0: registered device vbi0
[27086.748393] bttv0: registered device radio0
[27086.748416] bttv0: PLL: 28636363 => 35468950 .
[27086.754854] bttv0: PLL: 28636363 => 35468950 .. ok
[27086.782948] input: bttv IR (card=38) as /devices/pci0000:00/0000:00:1e.0/0000:02:0a.0/rc/rc3/input8
[27086.783099] rc3: bttv IR (card=38) as /devices/pci0000:00/0000:00:1e.0/0000:02:0a.0/rc/rc3

Tv-tuner video and audio works fine, composite video works fine but I have no composite audio. The adapter shipped with the card is very similar to this one:
http://www.avermedia-usa.com/AVerTV/Upload/SpecialPagePic/S-Video%20Composite%20Dongle%20Cable.jpg
but the usb connector on the picture is some sort of S-video like connector in my tv card.

So, I was corrected by irc #v4l user iive who told me there is no such thing as composite audio, but what happens is that composite video comes often paired with rca audio connectors.

Thanks for the clarification.

Now the problem may be in switching the audio inputs. Because tv-tuner audio works fine. Also when I switch to composite I still hear the tv-tuner audio.

iive also mentioned the issue might be about how to multiplex the audio inputs and some gpio.

Is this some sort of bttv driver bug? or can it be sorted out with a modprobe bttv parameter? If there is any other info I can include please tell me.

Thanks.

Here's a picture of the bundle it seems:

	http://img467.imageshack.us/img467/4516/0000415smalljn3.jpg

S-video doesn't carry audio signals so cards cable is associated with a 3.5 mm audio jack. Since I don't see that card has an audio input connector (doesn't support?) you plug that one in your sound card input.

- use tv card for video
- use sound card for audio