Found the firmware that will work glacier mp4's speaker!
 

Go here

http://www.mympxplayer.org/full-firm...res-df652.html

then download

After downloading upgrade your glacier with the firmware version 9.0.43_1!

I hope i've helped!!

For thos who want their mp4 sound quality better,

Go here: http://www.mympxplayer.org/1-vt4234....r=asc&&start=0