DigiTech Midi Implementation Manual page 125

Byte 4 2.5 kHz
Byte 5 6.3 kHz
Byte 6 16 kHz
Sales mode flag (0 - 1)
0 Normal operation
1 Run Sales Banner
64 Program names
Each program name is 16 bytes long. (16 * 64 = 1024 Bytes). The character
set for the GSP21 is at the end of this document.
GSP7 Parameters
The GSP7 parameters are listed in alphabetical order. The display value of
the parameter is given if the display value is different then the parameter
value.
63 Hz (0-24)
0 -12 dB
1 -11 dB
2 -10 dB
3 - 9 dB
4 - 8 dB
5 - 7 dB
6 - 6 dB
7 - 5 dB
8 - 4 dB
9 - 3 dB
10 - 2 dB