Dave Smith Instruments POLY EVOLVER KEYBOARD - Manual (Page 60)

Waveshape Data Dump
Status Description
1111 0000 System Exclusive (SysEx)
0000 0001 DSI ID
0010 0000 Evolver ID
0000 0001 File Version
0000 1010 Waveshape Data
0vvv vvvv Waveshape number, 0 – 127, corresponds to Waveshapes 1 – 128. Only
Waveshapes 96 – 127 can be sent to Evolver and saved as user
programmable; others will be ignored.
0vvv vvvv 293 bytes in “packed MS bit” format (see page Error! Bookmark not
defined.). The 293 bytes = 256 data bytes, in the format of LS byte/MS
byte, for the 128 16-bit words that make up a waveshape. The ROM
Waveshapes are 12 bit two’s complement (to match the VS), but the User
Waveshapes (97 – 128) can be a full 16 bits.
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 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 E6 E5 E4 E3 E2 E1 E0
8 00 G6 G5 G4 G3 G2 G1 G0
This is why it takes 220 MIDI bytes to transmit 192 Program/Sequence data bytes, and 293
bytes to send 256 Waveshape bytes.
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