[mythtv-users] Volume difference between sources: is there a way to fix it?

Ian Trider iantri at gmail.com
Thu May 26 21:42:55 UTC 2005


On 5/26/05, Kevin Kuphal <kuphal at dls.net> wrote:

> Adjust the mixer settings for each card using alsamixer so that one is
> higher/lower than the other until they are balanced.

Unfortunately, the PVR-x50 audio controls are not exposed through ALSA
since the card deals with the video/audio internally and spits out
MPEG program streams.

I do not believe it is possible to adjust the volume the card records
at for each individual input, but a hack that may work is to set (or
add to) a channel change script for both analog and digital cable
indivdually that invokes ivtvctl to adjust the volume to the
appropriate level.  MythTV will run this script every time it tunes to
a channel on the respective input, so this should ensure that the
audio is at the right level.

I don't know how Myth deals with channel-change scripts on tuner
inputs; you may need to have a line in the script that tunes the tuner
to the right channel (in the case of analog cable; that is if Myth
stops attempting to do it itself when a script is set.) using
ptune.pl.

-- 
Ian Trider
iantri at gmail.com


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