Casio CDP-220R - Manual (Page 5)

Part I
MIDI Message Overview
1 Product Configuration as a MIDI Device
As a MIDI device, this Instrument consists of the System Section, Performance Controller Section, and
Sound Generator Section described below. Each of these sections can send and receive specific MIDI
Messages in accordance with its function.
1.1 System Section
The System Section manages the Instrument status and user data. A communication method known as
a ”bulk dump” can be used for two-way transfer of user data between the Instrument and a computer.
1.2 Performance Controller Section
The Performance Controller Section performs keyboard play and controller operations, and generates
performance messages in accordance with auto play, etc. Basically, generated performance messages are
sent to external destinations while also being transmitted to the Sound Generator Section. The channel
number of the sent channel message is in accordance with the Instrument’s instrument part number.
MIDI Output Performance Information The following describes the performance information
that is output and is not output as MIDI signals.
• Output performance
– Keyboard play and controller operations by the musician
– Auto accompaniment
– Recorded song playback
• Non-output performance
– Demo Songs
– Song playback
– Lesson function
– Music Challenge
1.3 Sound Generator Section
The Sound Generator Section mainly performs receive of performance information and sound source
setting information. It consists of a common part that does not depend on the channel and a musical
instrument part that is independent of each channel.
1.3.1 Sound Generator Common Block
The common block consists of system effects, mixer master control, etc. These can be controlled by
general universal system exclusive messages, and the Instrument’s system exclusive messages.
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