Casio PX-7WE User Manual download pdf (Page 28)

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

IPRYYYYYYYYYYYYY-Y

IPSYYYYYYYYYYYYYYY

1 ... 27 28 29 ... 46

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Casio PX-7WE User Manual Page 28