User Manual

74A-16R Pe R s o n A l Mi x e R A n d A-16Cs Co n t R o l su R f A C e us e R Gu i d e
terminates/ends the packet. Described below is an overview of a generic
MIDI SysEx packet structure.
SysEx Head Message Data SysEx Tail
Figure 3 - MIDI General Packet Structure
The specifics and mechanics of the various packet pieces are described in
the subsequent sections.
2.1. MIDI System Exclusive Packet Head
Several data bytes define the “SysEx Packet Head.” Among these are
the standard “Start of Exclusive” also known as SOX, a standard MIDI
Manufacturer’s ID assigned by the MIDI Manufacturers Association (MMA)
and Aviom proprietary product and message type identification. SysEx
messages that contain incorrect or unknown ID information or unsupported
message types are ignored by the A‑16R without generating error indications.
The MIDI SysEx packet head of an A‑16R SysEx packet is described below.
SOX 1111 0000 (F0H) Start of Exclusive
Manufacturer’s ID 0000 0000 (00H) Aviom Manufacturer’s ID
Byte 1
0000 0001 (01H) Aviom Manufacturer’s ID
Byte 2
0100 0101 (45H) Aviom Manufacturer’s ID
Byte 3
Family ID 0000 0000 (00H) (A16 Family)
Product ID 0000 0000 (00H) (A‑16R Product)
Device ID 0000 0000 (00H) (expansion)
Msg. Type 0mmm
mmmm
‑ See table 1 for valid
message types
Msg. Descriptor 0000 0000 (00H) Message Descriptor Byte 1
(expansion)
0000 0000 (00H) Message Descriptor Byte 2
(expansion)
0000 0000 (00H) Message Descriptor Byte 3
(expansion)
0000 0000 (00H) Message Descriptor Byte 4
(expansion)
0000 0000 (00H) Message Descriptor Byte 5
(expansion)
0000 0000 (00H) Message Descriptor Byte 6
(expansion)