I assume the sound output of your tv card goes through line in. Try KMix to deselect line in.
I love the new Knoppix DVD but have a problem I haven't encountered with any other distro of Linux - previous Knoppix included:
I have an old ATI TV Card in my computer and when my machine boots with Knoppix, it "senses" the card and immediate begins playing TV sound. If I try to load the TV software xawtv, the software works flawlessly - as good as the MS software that was made for the card. However, if I close the program, the sound stays on until I turn off the machine.
Of course I could mute it, but finding out how to fix the problem is so much more fun.
I assume the sound output of your tv card goes through line in. Try KMix to deselect line in.
Amiga (AmigaOne) X1000 Computer and More
$1599.00
Amiga 3000 SCSI2SD/ZULUSCSI Card Bracket
$20.00
BlueSCSI V2 WiFi (Desktop) Modern Storage for Vintage Computers Latest Model
$53.50
Amiga 1000 Kickstart v1.3, Workbench + Extras on DD 3.5" Floppy Disk Boot A1000
$18.99
Amiga (AppleTalk) Networking DoubleTalk Card and A500 Interact Expansion board
$259.95
Amiga 4000 Highflyer Desktop Computer Video Toaster, Oktogon, Flyer 4 HD, Works
$4595.00
Tested Commodore Amiga 2000HD Model A2000 Computer
$899.99
Commodore Amiga Stereo Sound Sampler Techno Sound Turbo Rare Limited US Seller
$49.99
$15.95
Amiga 500 Gotek USB Floppy Drive Emulator Complete Kit with Gotek
$38.00