I noticed the volume on MythTV seemed rather low. Poking around the net I found this thread and followed the directions as follows:
Then as suggested later in the thread, I saved the results (has to be done as root):
% alsamixerAnd set Master and PCM volume to 100% (Master was down at 70%). That fixed my problem.
Then as suggested later in the thread, I saved the results (has to be done as root):
% sudo alsactl store