Casio PX-330 - Manual (Page 28)

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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.
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.
Function Section Parameter Category Description
System System Commands, Instrument status
Setup Instrument basic settings
Sound Generator Patch Sound source common settings (system effects, master
settings, etc.)
Sound source part settings (tone selection, mixing,
tuning, etc.)
Tone Tone parameter, DSP settings
Scale Tune Scale Tune Table
Music Player Music Library User song data
act SX MAN MOD dev act body (Depends on act.) EOX
cat mem pset blk pkt prm idx len data
IPR Y Y Y Y Y Y Y Y Y Y Y Y Y - Y
IPS Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y