Grass Valley Maestro Master Control Reference Manual v.2.4.0 - Manual (Page 50)

50 MAESTRO — Automation Interface Protocol Technical Reference Manual
Section 4 — Definition of Supported Saturn Commands
(0x3F) Common Extension
The Extension Set command UPDATE (0x07) is enhanced to specify Maestro commands.
Extension (0xFF) precedes each Maestro command (I/F name). E.g.:
STX | LEN | 3F | 07 | 01 | FF | 40 | FF | 41 | 02 |
This would activate UPDATE for MAESTRO_TRANSITION_TYPE and
MAESTRO_TRANSITION_RATE
The MUTE command would switch off all responses (Legacy or Maestro).