Bttv and composite audio

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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.


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