Yamaha DX21 CONGRATULATIONS, CONTENTS, DATA CHART, PRECAUTIONS, MIDI DATA FORMAT, CHAPTER I: SETTlNG UP, GENERAL SPECIFICATIONS, CHAPTER II: PLAYING THE DX21

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.. ............................................................		2
CHAPTER I: SETTlNG 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
5. The 128 Voice ROM Memory.......................................		7
CHAPTER III: THE FUNCTION MODE................................		9
1. Accessing the FUNCTION Mode ..............................		9
2. Entering Function Data..........................................		9
3. The Performance Parameters...............................		10
4. Tuning Functions ....................................................		14
5. Memory Management Functions...........................		15
6. MIDI Functions .........................................................		20

CHAPTER IV: THE PERFORMANCE MEMORY................. 22
1. Performance Memory 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 FM Synthesis...................................		23
2. The EDIT and COMPARE modes.............................		28
3. The Voice Parameters .............................................		28
4. STORING Voice Data..............................................		36
5. Two Approaches to Creating
Your Own Voices .....................................................		36
GENERAL SPECIFICATIONS ......................................		37
MIDI DATA FORMAT .......................................................		38
1. Transmission	Parameters .......................................	38
2. Transmission	Data................................................	38
3. Reception Parameters .............................................		41
4. Reception Data.......................................................		42
5. System Exclusive Data ............................................		45
DATA CHART ..................................................................		49

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