Command:   Description:

Sx 	   Convert text-to-speech: x = message (1023 characters maximum)
Dx	   Play demonstration message: x = 0 (Speaking), 1 (Singing), 2 (Spanish)
X 	   Stop playback (while message is playing)
Z 	   Pause/un-pause playback (while message is playing)
Nx	   Select voice: x = 0 to 8
Vx 	   Set audio volume (dB): x = -48 to 18
Wx 	   Set speaking rate (words/minute): x = 75 to 600
Lx	   Select language: x = 0 (US English), 1 (Castilian Spanish), 2 (Latin Spanish)
Px 	   Select parser: x = 0 (DECtalk), 1 (Epson)
R 	   Revert to default text-to-speech settings
C 	   Print current text-to-speech settings
I 	   Print version information
H 	   Print list of available commands

*The EZ-B only transmits over the Serial Port thus Print options are ignored as 
    possible commands