Instrument-Specific System Exclusive Messages; Format; Message Classifications; Basic Message Structure - Casio AP-220 Implementation Manual

Part IV

Instrument-Specific System Exclusive Messages

16

Format

This section explains the format of the Instrument-specific System Exclusive Messages. See "Part V Parameter List" for
information about what type of data can actually be sent.
16.1

Message Classifications

Basically, the operation that corresponds to Instrument-specific system exclusive messages is parameter data transfer. The
following operations can be performed from an external device using this parameter transfer message.
Modification of an individual Instrument parameter
•
Import of an individual Instrument parameter value
•
In addition to parameters being used as device setting values, some parameters act as commands when received by the
Instrument and as device status information when sent from the Instrument.
The following table shows the parameter category for each type of transfer.
Function Section Parameter Category Description
System System
Setup
Sound Generator Patch
Tone
Scale Tune
Music Player Music Library
16.2

Basic Message Structure

Since Instrument-specific System Exclusive messages are sent and received on an individual parameter basis, the Individual
Parameter Transfer method is used, and a number of message types are provided to suit specific operations. The field in
the SysEx message that specifies the message type is the action (act) field. The format of the "body" part of the message
depends on the "act" value.
The table below shows the body format for each action of Instrument-specific system exclusive messages. An actual message
consists of the items indicated by "Y", from left to right.
act SX MAN MOD
IPR Y Y Y
IPS Y Y Y
Commands, Instrument status
Instrument basic settings
Sound source common settings (system effects, master
settings, etc.)
Sound source part settings (tone selection, mixing,
tuning, etc.)
Tone parameter, DSP settings
Scale Tune Table
User song data
dev act
cat mem
Y Y Y Y
Y Y Y Y
body (Depends on act.)
pset blk pkt prm
Y Y Y Y
Y Y Y Y
28
EOX
idx len data
Y Y - Y
Y Y Y Y