Proteus operation manual
125
PROTEUS/2, PROTEUS/3 and PROTEUS EXPANSION SETS
Revision 4 3-4-92
Please note changes to “Instrument List” command and the addition of
variable chorus.
SOUND SETS
A Proteus sound set consists of 4 Megabytes of sample data (sound
ROMs), plus additional instrument data in the program ROMs. Proteus
may contain one or two complete sound sets. Each sound set has a unique
ID number; the “Pop/Rock” sound set in Proteus/1 is sound set #0.
Proteus/2 contains sound sets #1 and #2. It is desirable to be able to
support “mix-and-match” configurations, and be able to successfully
transfer presets from one configuration to another. For example, it should
be possible to exchange presets between a Proteus/2 and an expanded
Proteus/1 if the instruments come from common sound sets.
In order to achieve this compatibility between different Proteus configu-
rations, it is necessary to include the sound set number as part of the
instrument number when exchanging data. The instrument number (as
expressed over MIDI) now 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).
Since Proteus/1 contains sound set #0, compatibility with existing prod-
ucts is maintained.
Instrument bit fields:
12 8 7 0
<—sound set—> <———instrument #———>
(5 bits) (8 bits)
Within any given sound set, the first instrument is #1, and #0 selects
“None”.
MIDI Specifications
ADDENDUM TO MIDI SPECIFICATION
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