07.06 : Request Control Surface Snapshot
07.08 : Request MIDI Settings (Local Control, etc.)
07.09 : Request Single MIDI Input mapping
07.0A : Request Analog mapping
07.0B : Request Button mapping
07.0C : Request MIDI Basic Channel
07.0D : Request MIDI Output Merge setting
07.0F : Request crossfader Flip setting
08 : MIDI Settings Response
09 : Map Single LED Indicator
0A : Map Analog Inputs
0B : Map Buttons
0C : Set MIDI Basic Channel
0D : Set MIDI Output Merge
0E : Erase entire MIDI Input Map
0F : Set crossfader Flip
7E : NAK Negative Acknowledge
7F : ACK Positive Acknowledge
Commands 0, 1, and 3 are Ohm "classic" System Exclusive commands. Even though the MIDI
Manufacturer ID is different, and the command structure is different as well, these skipped command
numbers pay tribute to what came before.
COMMAND DETAILS
02 : Save User Settings
F0 00 01 61 02 02 F7
All User Settings which can be remembered will be stored in Flash and automatically restored whenever the
Ohm64 is powered up. The Ohm64 responds with ACK when finished processing this command.
04 : Set all LED indicators
F0 00 01 61 02 04 LL HH LL HH LL HH LL HH LL HH LL HH F7
All (75) LED indicators can be set on or off with this command. There are (12) bytes, or 6 pairs of LL HH.
Values must be 7F or less. The first LL HH pair represents column 1, with each subsequent LL HH pair
representing the next column. Within each pair, LL represents the first 7 rows, and HH represents the
remaining 6 rows. There are (14) bits total for rows, but bit (11) is unavailable and reserved for future use. A
1 bit turns the LED off, a 0 bit turns it on.
The LED columns and rows do not conveniently match up with the physical layout of the Button columns
and rows. Using codes as C.R to specify column and row, the LED codes are as follows (all codes are
decimal in this table, and all columns and rows are numbered starting at 1 - the first line is the first Button
column from first to last row, etc.):
64 grid:
1.1, 3.2, 5.3, 1.5, 3.6, 5.7, 1.9, 3.10,
2.1, 4.2, 6.3, 2.5, 4.6, 6.7, 2.9, 4.10,
3.1, 5.2, 1.4, 3.5, 5.6, 1.8, 3.9, 5.10,
4.1, 6.2, 2.4, 4.5, 6.6, 2.8, 4.9, 6.10,
5.1, 1.3, 3.4, 5.5, 1.7, 3.8, 5.9, 1.12,
6.1, 2.3, 4.4, 6.5, 2.7, 4.8, 6.9, 2.12,
