Yamaha Clavinova CLP-157 Manuale d'uso - Pagina 23

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MIDI Functions

A Brief Introduction to MIDI

MIDI Cable

MIDI OUT

Clavinova

Data Being Recorded

Playback Data

MIDI OUT

MIDI IN

Clavinova

MIDI "Messages" Transmitted

& Received by the Clavinova

Note and Velocity Data

This information tells the receiving keyboard or tone generator to play a certain note (specified by the MIDI

note number) at a certain dynamic level (specified by the MIDI velocity value). Note and velocity data is trans-

mitted by the Clavinova whenever a key is pressed, and the Clavinova's internal AWM tone generator will

"play" the corresponding note(s) whenever note and velocity data is received from an external MIDI device.

Program Change Numbers

The CLP-157 transmits a MIDI program change number between 0 and 9 when one of its voice selectors is

pressed. This normally causes the correspondingly numbered voice to be selected on a receiving MIDI device.

The Clavinova will respond in the same way, automatically selecting the appropriate voice when a MIDI pro-

gram change number is received. See "Program Change ON/OFF" on page 20 for information on turning pro-

gram change number reception and transmission ON or OFF.

Control Change Numbers

Control Change data representing Damper pedal operation is transmitted by the Clavinova whenever one of

these pedals is used. If the receiving device is a tone generator or another keyboard, it will respond in the same

way as the Clavinova's internal tone generator when one of the pedals is used. The Clavinova also receives and

responds to the appropriate control change data. See "Control Change ON/OFF" on page 21 for information on

turning control change number reception and transmission ON or OFF.

MIDI, the Musical Instrument Digital Interface, is a world-standard com-

munication interface that allows MIDI-compatible musical instruments and

equipment to share musical information and control one another. This

makes it possible to create "systems" of MIDI instruments and equipment

MIDI IN

that offer far greater versatility and control than is available with isolated

instruments. For example, most MIDI keyboards (including the Clavinova,

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of course) transmit note and velocity (touch response) information via the

MIDI OUT connector whenever a note is played on the keyboard. If the

MIDI OUT connector is connected to the MIDI IN connector of a second

keyboard (synthesizer, etc.) or a tone generator (essentially a synthesizer

with no keyboard), the second keyboard or tone generator will respond

precisely to notes played on the original transmitting keyboard. The result is

that you can effectively play two instruments at once, providing thick multi-

instrument sounds.

This same type of musical information transfer is used for MIDI se-

quence recording. A sequence recorder can be used to "record" MIDI data

MIDI OUT

MIDI IN

received from a Clavinova, for example. When the recorded data is played

back, the Clavinova automatically "plays" the recorded performance in

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precise detail.

The examples given above really only scratch the surface. MIDI can do

much, much more. The CLP-157 offers a number of MIDI functions that

allows it to be used in fairly sophisticated MIDI systems.

NOTE

The MIDI information (messages) transmitted and received by the CLP-

157 Clavinova are as follows:

• Always use a high-quality MIDI cable to connect MIDI OUT to MIDI IN

terminals. Never use MIDI cables longer than about 15 feet, since cables

longer than this can pick up noise which can cause data errors.