Dave Smith Instruments TETR4 Spécifications télécharger pdf (Page 73)

Mode Change: Combo Mode

Status Description

1111 0000 System Exclusive (SysEx)

0000 0001 DSI ID

0010 0110 Tetra ID

0011 0001 Select Combo Mode

1111 0111 End of Exclusive (EOX)

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 F6 F5 F4 F3 F2 F1 F0 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 293 MIDI bytes to transmit 256 Program data bytes.

1 2 ... 68 69 70 71 72 73 74 75 76

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Dave Smith Instruments TETR4 Spécifications Page 73