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Yamaha DX21 User Manual

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CONGRATULATIONS!

Your Yamaha DX21 Digital Programmable Algorithm Synthsizer incorporates the
state-of-the-art in digital FM tone generation technology, providing extraordinarily vi-

brant, rich voices and outstanding playability. The DX21 actually has two FM tone
generators, permitting two voices to be combined and played simultaneously, or in a

split keyboard configuration. The DX21 has a 32-voice programmable RAM memory
from which any voice can be selected at the touch of a button, a built-in 128-voice preset

ROM memory from which voices can be called into the RAM memory as desired, 32

special “performance” memories which can be programmed with combinations of voices
and some function parameters, and a cassette interface that permits unlimited storage
of FM voices. Of course, the DX21 is fully programmable, allowing you to create your

own FM voices or sound effects. Broad MIDI compatibility is also provided so the DX21
can control or be controlled via other MIDI compatible music equipment. To ensure
that you gain maximum benefit from all the performance and flexibility provided by the

DX21, we urge you to read this owner’s manual thoroughly while actually trying out

all of the available functions.

CONTENTS

PRECAUTIONS..

5. The

............................................................

128 Voice ROM Memory

2

CHAPTER I:

.......................................

SETTlNG

7

UP........................................... 3

1. Audio Outputs .......................................................... 3

2. Optional Foot Controllers & Foot Switches.............. 3
3. Optional BC1 Breath Controller ............................... 3

4. Headphones ............................................................. 3
5. MIDI Terminals......................................................... 3
6. Cassette ................................................................... 3
7. AC Power ................................................................. 4
8. Music Rack Installation ............................................ 4

CHAPTER II: PLAYING THE DX21 ..................................... 5

1. The 32 Voice RAM Memory ................................... 5

2. The SINGLE Play Mode .......................................... 5
3. The DUAL Play Mode ............................................. 6
4. The SPLIT Play Mode ............................................. 6

CHAPTER IV: THE PERFORMANCE MEMORY................. 22

1. Performance Memory

2.

5.

1.

2. Transmission Data

Organization ........................ 22

2. Accessing the Performance Memory ...................... 22
3. Programming the Performance Memory............... 22
4. The Performance Name......................................... 22

CHAPTER V: VOICE PROGRAMMING.............................. 23

1. The Basics of F M Synthesis................................... 23

The EDIT and COMPARE modes ............................. 28

3. The Voice Parameters ............................................. 28
4. STORING Voice Data .............................................. 36

Two Approaches to Creating

Your Own Voices ..................................................... 36

GENERAL SPECIFICATIONS ......................................

37

MIDI DATA FORMAT ....................................................... 38

Transmission Parameters ....................................... 38

................................................ 38

CHAPTER III: THE FUNCTION MODE................................ 9 3. Reception Parameters ............................................. 41

1. Accessing the FUNCTION Mode .............................. 9 4. Reception Data ....................................................... 42

2. Entering Function Data.......................................... 9 5. System Exclusive Data ............................................ 45
3. The Performance Parameters............................... 10
4. Tuning Functions 14

DATA CHART .................................................................. 49

....................................................

5. Memory Management Functions........................... 15
6. MIDI Functions ......................................................... 20

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