HP Princeton HP-21 - Manual (Page 17)

MIDI
The MIDI connections are located at the rear panel of the unit.
The following shows the description of MIDI and the steps of using MIDI.
What is MIDI?
MIDI stands for Musical Instrument Digital Interface. MIDI is a world wide standard that makes
it possible for various electronic musical instruments and other devices, such as computers, to
"communicate with each other".
The keyboard is equipped with two types of MIDI
connections, both are located on the rear panel.
MIDI IN
Data transmitted from other MIDI instruments via
MIDI, is received at this terminal.
MIDI OUT
Data produces by the keyboard, is transmitted to
other MIDI instruments via MIDI from this
terminal.
MIDI IN/OUT
Terminals
What can you do with MIDI?
Record data by using the Auto Accompaniment on an external sequencer .
After recording, you can edit the data with the sequencer.
MIDI IN MIDI OUT
MIDI transmit
Play music from another keyboard .
MIDI IN MIDI OUT
MIDI transmit