[mythtv-users] Audio breakup problems on channel 60 with PVR-150MCE

Stephen Trier sct at po.cwru.edu
Fri Jan 6 22:52:08 UTC 2006


My MythTV installation works great, except for channel 60.  On that
channel only, the audio is broken up very rapidly.  It's getting chopped
up, dropping out and coming back a few times a second.  It is a lot
like what multipath fading sounds like on FM radio when it's caused by a
passing airplane or other moving object.  The video on channel 60 looks
fine; it's just the audio that is messed up.

I'm using two PVR-150MCE tuners, Gentoo, MythTV 0.18.1-r1, and
ivtv-0.4.0-r2, on AMD64 (Asus A8V Deluxe motherboard).  My source is
NTSC cable TV in the US, and channel 60 is the USA network for me.

The problem is identical on both tuners.  The problem shows up in
mplayer and in MythTV, and within MythTV both in recordings and live TV.
Going directly from the cable line to the tuner vs. putting the line
through a splitter first makes no difference.

When I connect the cable feed directly to the TV, channel 60 sounds OK.
(It sounds slightly noisier/fuzzier than other channels, but I have to
listen very careful to discern it.)

I played with Myth's fine tuning setting without any luck.

No other channels have the problem.

Any ideas?

              Stephen

-- 
Stephen Trier
Technical Development Lab
Cleveland FES Center
sct at po.cwru.edu


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