[Freeswitch-users] prompt playback volume using mod_shout

Hi, I'm finding that when I record a caller's voice using mod_shout in MP3 format, the recording is too soft when I play it back. I see there's a "volume" setting in shout.conf.xml, but it says, "Dont change these unless you are insane". When I insanely try to increase this value, I don't here any difference in volume. Is this the right knob, or is there some other way to do this? Thanks, Marc