Controlling the GX700

January 20th, 2010 by iain | Posted in *, Instuments |

Can only control 4 params per patch by using midi CC. However any number can be controlled by sending sysex messages. ie

F0 41 00 79 12 08 00 aa aa cs F7

This is the command structure:

F0 Sysex start
41 Roland manufacturer ID
00 Device ID
79 Model ID (GX700)
12 Command (Data transfer)
08 Address of the temporary buffer area
00 (the area used when a patch is being edited)
aa Address of the parameter to be changed
aa
cs Check sum
F7 End sysex

aa values for different paramaters

00 00 Output level
00 01 chain 1st
00 02 chain 2nd
.. ..
00 0d chain 13th
00 0e Name #1 Character code
.. ..
00 19 Name #12 Character code
00 1a Assign #1 target MSB
00 1b Assign #1 target LSB
.. ..
01 00 Compressor on/off

Examples

Preamp gain: F0 41 00 79 12 08 00 04 09 pr cs F7
Flanger/Phaser Resonance: F0 41 00 79 12 08 00 09 0B pr pr cs (set param format to 2nibbles hi/lo)