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MythTV, Slackware, and Sound Recording
I had the same problem on Slackware 9.0 with MythTV -- video basically looked like scrambled cable channels.
I discovered that if I build MythTV with a 2.4.22 kernel source tree installed, and then run it under a 2.6.1 kernel, the problem goes away and it runs perfectly. I don't know why this happens, it's some interaction between the kernel drivers, the MythTV software, and gcc, evidently. I don't know if this would happen under Slackware 9.1 since that uses a newer gcc.
As far as sound under freevo... You need to load the btaudio driver to get digital audio from the tv tuner to output on /dev/dsp2. What I do is mute the line-in on my sound card, and tell MythTV to use /dev/dsp2 as the sound input instead of /dev/dsp. (You want to mute the line-in as that's normally how you hear sound from the tuner, and if you don't do this you'll hear it when you're recording movies and you'll hear two different, slightly out of sync sound streams when playing live TV with e.g. MythTV).
Anyway, I hope this helps.
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