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• Note 9 - Sound Sets
A Vintage Keys sound set consists of sample data (sound ROMs), plus
additional instrument data in the program ROMs. Each sound set has
a unique ID number. The sound set for Vintage Keys is #6.
It is necessary to include the sound set number as part of the instru-
ment number when exchanging data. The complete instrument num-
ber contains two fields: bits 8-12 specify the sound set (0-31) and bits
0-7 specify the instrument within the sound set (0-255).
Instrument Bit Fields:
12
<— sound set —> <——— instrument # ———>
(5 bits)
Within any given sound set, the first instrument is #1 and #0 selects
"None".
The "magic number" 1536 represents the start number for the stan-
dard Vintage Keys instruments. To calculate the complete instrument
number follow the instructions below.
SysEx Instr. No. = 1536 + Vintage Keys Instr. No.
Next you must convert the SysEx instrument number to a 14-bit MIDI
number. See the information on the following pages.
Example:
Suppose we want to change the instrument to I002 B3 Dist Fast.
1)
1536 + 2 = 1538 (1536 + Instr. No.)
1538 ÷ 128 = 12 r-2 = 12 (ignore remainder)
2)
3)
12 in Hex = 0C = msb
4)
remainder 2 in Hex = 02 = lsb
5)
SysEx Instrument Number = lsb
The complete message to change the primary instrument to #02:
F0 18 0A dd 03 17 00 02 0C F7
8
7
(8 bits)
msb
02
0C
0
Chapter 7: Reference Section
MIDI SPECIFICATIONS
113
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