User Manual

Packed Data Format

Data is packed in 8 byte “packets”, with the MS bit stripped from 7 parameter

bytes, and packed into an eighth byte, which is sent at the start of the 8 byte

packet.

Example:

Input Data

Packed MIDI data

1 A7 A6 A5 A4 A3 A2 A1 A0 1 00 G7 F7 E7 D7 C7 B7 A7

2 B7 B6 B5 B4 B3 B2 B1 B0 2 00 A6 A5 A4 A3 A2 A1 A0

3 C7 C6 C5 C4 C3 C2 C1 C0 3 00 B6 B5 B4 B3 B2 B1 B0

4 D7 D6 D5 D4 D3 D2 D1 D0 4 00 C6 C5 C4 C3 C2 C1 C0

5 E7 E6 E5 E4 E3 E2 E1 E0 5 00 D6 D5 D4 D3 D2 D1 D0

6 F7 E6 E5 E4 E3 E2 E1 E0 6 00 E6 E5 E4 E3 E2 E1 E0

7 G7 G6 G5 G4 G3 G2 G1 G0 7 00 F6 F5 F4 F3 F2 F1 F0

8 00 G6 G5 G4 G3 G2 G1 G0

This explains why it takes 439 MIDI bytes to transmit 384 Program data bytes.