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19.3.18 EOX : End of System Exclusive Message

Format: 11110111B

This is the End of System Exclusive Message status byte established by the MIDI standard.

20 Individual Parameter Operations

There are two parameter unit operations: Individual Parameter Transfer and Individual Parameter

Request. For one session, in response to an IPR (Individual Parameter Request) from an external

device, this Instrument returns an IPS (Individual Parameter Send) or the session is concluded when

the external device or this Instrument spontaneously sends an IPS. If this Instrument received an IPS,

the value of the applicable parameter is changed. Depending on the function of a parameter, Individual

Parameter Send may be used to issue a command to the Instrument and Individual Parameter Request

may be used to check Instrument status information.

Data Receiver Data Sender Operation

IPR → Send Request(Optional)

← IPS Data Transfer

21 Parameter Set Transfer

21.1 Communication Modes

21.1.1 One-way and Handshake

In order to ensure maximum speed for bulk dumping of Parameter Sets, the data format is diﬀerent from

the data format used for Individual Parameter Send. Data is transferred as-is, using the Model’s memory

image. Parameter Sets can be transferred by bulk dump using the message exchange types described

below.

• One-way mode Parameter Set send/receive

• One-way mode Parameter Set send request send/receive

• Handshake mode Parameter Set send/receive

• Handshake mode Parameter Set send request, receive rejected, error notiﬁcation send/receive

With the one-way mode, the sending device sends data and ends the session without regard to the

response of the receiving device. This mo de is best for one-way transfers from a sequencer or similar

device.

With the handshake mode, the sending device sends the data and then waits for a response from the

receiving device before advancing to the next session. This is a high-speed mode in which there is no

time wasted waiting.

See “VI Parameter Set List” for details about Instrument parameter sets.

21.1.2 Session and Subsession

Subsession “One subsession” refers to transfer of one parameter set. A subsession transfers one

parameter set or a parameter set that has been divided into multiple packets for transfer, with EOD

(End of Data) at the end to terminate the send. Division of a parameter set into multiple packets is

used when the size of the parameter set is greater than a prescribed size. The packet number in the

packet index ﬁeld indicates the sequential position of a packet relative to the other packets. A single

packet cannot be used to transfer multiple small parameter sets. A parameter set delimiter always must

be transferred as a packet delimiter.

Casio CTK-4200 Midi Implementation

Other manuals for Casio CTK-4200