help with new bttv card entry

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