You can use System Exclusive messages (SysEx) to control practically any parameter in the FA-06/07/08. Here is information on constructing messages to control the Harmonic Bar (drawbar) settings in the SuperNatural Tonewheel Organ Tone on the FA-06/07/08.
Here is the basic layout of this specific SysEx message:
- F0 – Beginning of SysEx message
- 41 – Roland Manufacture ID
- 10 – Device ID
- 00 00 77 – Model ID (FA-06/FA-08)
- 12 - Command ID (DT1)
- 19 02 00 22 - Address
- XX – Data (for Harmonic Bars this will be 0-8)
- ZZ – Checksum (Error correction calculation)
- F7 – End of SysEx message
In the above message, the address (19 02 00 22) is specifying Part 1 and that this will affect the 16’ Harmonic Bar. The Data (XX) can be a value between 0-8, which represents the 8 steps that the Harmonic Bar can be set to. The Checksum (ZZ) is an error correction value that is computed using a mathematical formula based on the address and data values, so it will change as these change.
Here is the completed message to change the 16’ Harmonic Bar in the SuperNatural Organ on Part 1 to full (value of 8):
- F0 41 10 00 00 77 12 19 02 00 22 08 3B F7
Here are the messages for all 9 Harmonic Bar settings. Remember, these will only affect the SuperNatural Tonewheel Organ Tone on Part 1. You would need different address values to access Parts 2-16.
- 16’ Drawbar: F0 41 10 00 00 77 12 19 02 00 22 XX ZZ F7
- 5 1/3’ Drawbar: F0 41 10 00 00 77 12 19 02 00 23 XX ZZ F7
- 8’ Drawbar: F0 41 10 00 00 77 12 19 02 00 24 XX ZZ F7
- 4’ Drawbar: F0 41 10 00 00 77 12 19 02 00 25 XX ZZ F7
- 2 2/3’ Drawbar: F0 41 10 00 00 77 12 19 02 00 26 XX ZZ F7
- 2’ Drawbar: F0 41 10 00 00 77 12 19 02 00 27 XX ZZ F7
- 1 3/5’ Drawbar: F0 41 10 00 00 77 12 19 02 00 28 XX ZZ F7
- 1 1/3’ Drawbar: F0 41 10 00 00 77 12 19 02 00 29 XX ZZ F7
- 1’ Drawbar: F0 41 10 00 00 77 12 19 02 00 2A XX ZZ F7
XX=0-8 (for Harmonic Bars)
ZZ= Checksum