Hi all, After much procrastination i used one of the windows debuggy tools to take a look at the settings for my APAC viewcomp 878 tv+radio card. Here's what I saw : Radio (stereo) on: GPOE = 0x00400f GPDATA = 0x3ffff1 Radio mute: GPOE = 0x00400f GPDATA = 0x3ffff8 TV audio on: GPOE = 0x00400f GPDATA = 0x3ffff0 TV mute: GPOE = 0x00400f GPDATA = 0x3ffff8 >From this I came up with the following entry for the bttv 0.7.100 driver: },{ /* JP Fournier jape@xxxxxxxxxx */ name: "APAC Viewcomp 878", video_inputs: 2, audio_inputs: 1, tuner: 0, svhs: -1, gpiomask: 0x00400f, muxsel: { 2, 3, 1, 1 }, audiomux: { 0x3ffff1, 0x3ffff1, 0x3ffff1, 0x3ffff1, 0x3ffff8, 0x3ffff0 }, pll: PLL_28, tuner_type: TUNER_PHILIPS_NTSC, has_radio: 1, }}; The card itself only has 1 composite video input - no svhs. With a careful inspection of the card itself, it doesn't look like it has any of the "advanced" audio chips mentioned in the bttv driver docs. This entry appears to work, but I'm not sure what the muxsel refers to. This is just copied from another entry that mostly worked for me. Currently I am using an audio patch cable into my soundcard for sound, since I haven't had any luck getting btaudio to work. Any thoughts on the above would be appreciated. regards jp