Comment 24 for bug 613809

There is a patch for tvtime to support mixers from alsa devices:

http://www.stapelspeicher.org/tvtime/patches/experimental/

With that patch it supposed that you can use something like:

tvtime --mixer=hw:1/Line

I haven't tried that patch. I made a simple script for volume control

#!/bin/sh
DEVICE=hw:CARD=ICH5
CONTROL=iface=MIXER,numid=21
VOL=`amixer -D $DEVICE cget $CONTROL | grep ":" | cut -d"=" -f2 | cut -d"," -f1`
zenity --scale --value $VOL --print-partial --min-value=0 --max-value=31 --text Volumen --title "Volumen de TV" | xargs -n 1 amixer -D $DEVICE cset $CONTROL