Bedienungsanleitung Yamaha YPT-420 (Seite 85 von 107) (Englisch)

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YPT-420 Owner’s Manual 85

Connecting to a Computer

Nearly all of the electronic musical instruments made today—particularly synthesizers,

sequencers and computer music related devices—use MIDI. MIDI is a worldwide stan-

dard that allows these devices to send and receive performance and setting data. Natu-

rally, this instrument lets you save or send your keyboard performance as MIDI data, as

well as the songs, styles and panel settings.

The potential MIDI holds for your live performances and music creation/production is

enormous—simply by connecting this instrument to a computer and transmitting MIDI

data. In this section, you’ll learn the basics of MIDI and the speciﬁc MIDI functions pro-

vided by this instrument.

No doubt you have heard the terms “acoustic

instrument” and “digital instrument”. In the world

today, these are the two main categories of instru-

ments. Let’s consider a grand 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?

As shown in the illustration above, in an electronic

instrument the sampling note (previously recorded

note) stored in the tone generator section (elec-

tronic 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?

For example, let’s say you play a “C” quarter note

using the grand piano sound on the instrument.

Unlike an acoustic instrument that puts out a reso-

nated note, the electronic instrument puts out infor-

mation 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.

Example of Keyboard Information

Your keyboard performance and all panel opera-

tions of this instrument are processed as MIDI

data. The songs, auto accompaniment (styles), and

User songs are also made up of MIDI data.

MIDI is an acronym that stands for Musical Instru-

ment Digital Interface and it allows different musi-

cal instruments and devices to instantly

communicate with each other, via digital data. The

MIDI standard is used all over the world and was

designed to transmit performance data between

electronic musical instruments (or computers).

Thanks to MIDI, you can control one instrument

from another and transmit performance data

between the devices-taking your creative and per-

formance potential to even higher levels.

MIDI messages can be divided into two groups:

Channel messages and System messages.

What Is MIDI?

● Acoustic guitar note production

Pluck a string and the body

resonates the sound.

● Digital instrument note production

Based on playing information from the keyboard, a sampling note

stored in the tone generator is played through the speakers.

Playing the keyboard

Tone Generator

(Electronic circuit)

Sampling

Note

Sampling

Note

Voice number (with what voice) 1 (grand piano)

Note number (with which key) 60 (C3)

Note on (when was it pressed) and

note off (when was it released)

Timing expressed

numerically (quarter note)

Velocity (about how strong) 120 (strong)

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