RS232 command set:

g - Play
G - Stop
n - Next
p - Prevous
s - Next Playlist
S - Prevous Playlist
f - Fast Forward
F - Fast Rewind
a - Balance
b - Equalizer Mode
r - Random ON/OFF
e - Repeat ON/OFF
t - Time NORMAL/REMAIN
i - Info
u - Vol UP
d - Vol DOWNN
l - Playlist
m - Menu
w - Equalizer ON/OFF
! - Remote Codes Learn
