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The term MIDI is an acronym for Musical Instrument Digital Interface, an international standard for connecting
musical instruments, computers, and other devices to allow the exchange of performance data.
MIDI terminals
MIDI terminal Function
MIDI IN Receiving note, program change, and other data.
MIDI OUT Sending note, program change, and other data.
MIDI THRU Passing along MIDI data to another MIDI device without processing.
MIDI channels
MIDI uses channels to exchange data back and forth between MIDI devices. There are receive (MIDI IN) and transmit (MIDI OUT)
channels. Most musical instruments or devices with MIDI functions are equipped with both MIDI IN and OUT jacks and are
capable of transmitting and receiving data via MIDI. The receive channels are used to receive data from another MIDI device and
the transmit channels are used to transmit data to another MIDI device.
The illustration below shows three musical instruments, connected together using MIDI.
Transmitting instrument a Receiving instrument b Receiving instrument c
Transmitting instrument a sends transmit channel and keyboard information to receiving instruments b/c.
The information arrives at the receiving instruments b/c.
Receiving instruments b/c will respond to MIDI data that is sent if their receive channel is the same as the transmit channel of
the transmitting instrument a.
If the channels do not match, then the receiving instruments b/c will not respond to any data that is sent.
For both receiving and transmitting, channels 1-16 can be used.
Recording/playing with a sequencer
When connected to a sequencer, the CA93/CA63 digital piano
can be used to record and playback multi-track songs, with
separate sounds playing simultaneously on each channel.
Sequencer
About MIDI