Using The Midi Functions; What Is Midi - Yamaha YPP-200 Ligh Piano Owner's Manual

Using the MIDI Functions

The YPP-200 is MIDI-compatible, featuring MIDI IN and MIDI OUT terminals
and providing a variety of MIDI-related controls. By using the MIDI functions
you can expand your musical possibilities. This section explains what MIDI is,
and what it can do, as well as how you can use MIDI on your YPP-200.
world today, these are the two main categories of instruments. Let's consider an acoustic piano
and a classical guitar as representative acoustic instruments. They are easy to understand. 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?
Acoustic guitar note production
Pluck a string and the body
resonates the sound.
ously recorded note) stored in the tone generator section (electronic circuit) is played based on
information received from the keyboard. So then what is the information from the keyboard
that becomes the basis for note production?
200 keyboard. Unlike an acoustic instrument that puts out a resonated note, the electronic
instrument puts out information from the keyboard such as "with what voice," "with which
key," "about how strong," "when was it pressed," and "when was it released." Then each piece
of information is changed into a number value and sent to the tone generator. Using these
numbers as a basis, the tone generator plays the stored sampling note.
G Example of Keyboard Information
Voice (with what voice)
Note number (with which key)
Note on (when was it pressed) and
note off (when was it released)
Velocity (about how strong)
34
○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○
YPP-200

What Is MIDI?

No doubt you have heard the terms "acoustic instrument" and "digital instrument." In the
Based on playing information from the keyboard, a sampling note
stored in the tone generator is played through the speakers.
As shown in the illustration above, in an electronic instrument the sampling note (previ-
For example, let's say you play a "C" quarter note using the PIANO 1 sound on the YPP-
Digital instrument note production
Tone Generator
L
(Electronic circuit)
Sampling
Note
Playing the keyboard
PIANO 1
60 (C3)
Timing expressed numerically (quarter note)
100 (strong)
R
Sampling
Note