Peavey Spectrum Bass II Operation Manual page 30

Appendix C System Exclusive
Appendix C System Exclusive
SYSTEM EXCLUSIVE AND VOICE ARCHITECTURE
The Synth lias a System Exclusive implementation which makes it possible to perform rudimentary patch editing
for a single patch residing in the edit buffer. The contents of this edit buffer are lost on power down.
Spectrum Synth System Exclusive Patch Edit Command Format
FO System Exclusive Command
00 00 IB Peavey System Exclusive
02 Keyboard Family I.D.
0D Spectrum Bass n I.D.
<CH> MIDI In Channel (00-0F)
08 Update Edit Buffer Command
<ph, pi, vh, vl> Updates the Memory Byte at parameter offset ph, pi
F7 End of System Exclusive
Note: Parameter offsets are 7-bitized and values are nibblized.
Example 1:
For a desired Filter resonance value of 27 (lbh), the following suing would be sent:
F0 00 00 IB 02 0D 00 08 00 23 01 0b F7
This is assuming the Synth is on MIDI channel 1. Notice how the value of lah is nibblized.
Example 2:
For a desired oscillator coarse tuning value of -12 (F4h), the following string would be sent:
F0 00 00 IB 02 0D 00 08 00 10 Of 04 F7
Notice that negative values are represented in two's complement.
Other SysEx commands:
Initialize Edit Buffer (to create new patch from scratch):
F0 00 00 IB 02 0D <CH> 09 F7
Save Edit Buffer to current RAM location (if 0-63):
F0 00 00 IB 02 0D <CH> 07 00 F7
Dump 64 RAM patches:
F0 00 00 IB 02 0D <CH> 01 7F F7
The following is a table of program block offsets for the Synth.
Note: The offset values are listed in hex, the range values are listed in decimal
28
Spectrum
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Bass II