Yamaha 1100, PSR-2100 Whats MIDI?

Using Your PSR-2100/1100 with Other Devices
PSR-2100/1100
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• When using a MIDI interface with a Macintosh series
computer, connect the RS-422 terminal of the
computer (modem or printer terminal) to the MIDI
interface, then connect the MIDI OUT terminal on the
MIDI interface to the MIDI IN terminal of the PSR-
2100/1100, as shown in the diagram below.
• When using a Macintosh series computer, set the
MIDI interface clock setting in the application
software to match the setting of the MIDI interface
you are using. For details, refer to the owner’s
manual for the particular software you are using.
What’s MIDI?
Let’s consider an acoustic piano and a classical guitar as
representative acoustic instruments. With the piano, you
strike a key, and a hammer inside hits some strings and
plays a note. With the guitar, you directly pluck a string
and the note sounds.
But how does a digital instrument go about playing a
note?
As shown in the illustration above, in an electronic
instrument, the sampled note (previously recorded note)
stored in the tone generator section (electronic circuit) is
played based on information received from the keyboard,
and output through the speakers.
Now let’s examine what happens when we play back a
recording. When you playback a music CD (for example,
a solo piano recording), you’re hearing the actual sound
(vibrations in air) of the acoustic instrument. This is called
audio data, to distinguish it from MIDI data.
In the above example, the actual acoustic sounds of the
pianist’s performance are captured in the recording as
audio data, and this is recorded to CD. When you play
back that CD on your audio system, you can hear the
actual piano performance. The piano itself is not
necessary, since the recording contains the actual sounds
of the piano, and your speakers reproduce them.
MIDI IN RS422
MIDI OUT
MINI DIN
8-pin
Internal ampInternal amp
Tone generator
(Electric circuit)
Playing
the keyboard
RL
Pluck a string and the body
resonates the sound.
Based on playing information
from the keyboard, a
sampled note stored in the
tone generator is played
through the speakers.
Acoustic guitar note
production Digital instrument note production
Recording and playing back the performance of an acoustic
instrument (audio data)
Recording Playback
FD
Tone generator
Sequencer
FD
Recording and playing back the performance of a digital
instrument (MIDI data)
Controller (keyboard, etc.)
Recording Playback
In the case of digital instruments, the audio signals are sent
through output jacks (such as AUX OUT) on the instrument.