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.
NEW Sealed Cisco SFP-10G-LR 10GBASE-LR SFP+ 1310nm 10km *US Shipping*
$18.00
New Cisco SFP-25G-SR-S 25G SFP28 25GBASE-SR 850nm 300m LC MMF Transceiver Module
$51.30
New HP HPE Aruba J4858D 1G SFP LC SX 850nm 500m MMF XCVR Transceiver Module
$28.49
New Precision DWDM SFP+ 10G 80km Tunable Transceiver 50GHz C-Temp DWDM-SFP10G-C
$90.00
GENUINE Cisco SFP-10G-SR V03 SFP+ GBIC Transceiver Module 10-2415-03
$6.80
🔥🔥🔥 CISCO SFP-10G-SR V03 10-2415-03 850nm 10GBASE-SR SFP+ Multi Module 🔥🔥🔥
$6.80
Dell 10GBase SPF + Optical Transceiver Module - XYD50
$10.00
NEW FS SFP-10G-T 10GBASE T SFP+ 30M Transceiver Module (Lot of 1 Unit)
$39.95
New Cisco GLC-TE 1G SFP Copper RJ45 100m 1000BASE-T Transceiver Module
$22.32
A Pair For Cisco SFP-10G-BXD-I and SFP-10G-BXU-I Module, 10G SFP+ BIDI SMF 10km
$57.99