User Manual
Table Of Contents
- 1. INTRODUCTION
 - 2. THE DIGITONE KEYS
 - 3. PANEL LAYOUT AND CONNECTORS
 - 4. DIGITONE KEYS SOUND ARCHITECTURE
 - 5. OVERVIEW OF THE DIGITONE KEYS DATA STRUCTURE
 - 6. THE USER INTERFACE
 - 7. QUICK START
 - 8. DIGITONE KEYS CONTROLS
 - 9. PATTERNS AND SOUNDS
 - 10. THE SEQUENCER
 - 11. SYNTH TRACK PARAMETERS
 - 12. MIDI TRACK PARAMETERS
 - 13. FX PARAMETERS
 - 14. GLOBAL SETTINGS
 - 15. STARTUP MENU
 - 16. SETUP EXAMPLES
 - 17. USEFUL KEY COMBINATIONS
 - 18. TECHNICAL INFORMATION
 - 19. CREDITS AND CONTACT INFORMATION
 - APPENDIX A: THE DIGITONE KEYS FM SYNTHESIS
 - APPENDIX B: MIDI IMPLEMENTATION
 - APPENDIX C: LFO MODULATION DESTINATIONS
 - INDEX
 
Saw
(All partials)
Saw reduction
Odd/Even Mix
Square
(Odd partials)
Square 
reduction
Bell
The Digitone Keys uses a form of additive synthesis to create the harmonic series for the HARM parame-
ter. Additive synthesis is one of the oldest forms of electronic sound generation. It is a quite simple form of 
synthesis but still very powerful. The basic principle is to add multiple sine waves together to form complex 
timbres. Each sine wave is called a partial. Typically, each part is one octave above the previous. You retain 
the frequency of the tone by keeping the partials spread across octaves. By attenuating each partial, the 
timbre changes its harmonic content, resulting in dierent waveforms.
The first partial is always kept 
at full volume, which keeps the 
base octave intact.
The first partial is always 
kept at full volume,
which keeps the base 
octave intact.
Adding every partial in 
series will replicate a 
sawtooth. Note how the 
volume decreases for 
each partial, creating a 
natural fallo.
Adding every odd partial in 
series will approximate a 
squarewave.
This method can be used 
to make all sorts of timbres.
This for example sounds 
close to a bell tone.
Adding every partial in series 
will replicate a sawtooth. Note 
how the volume decreases for 
each partial, creating a natural 
fallo.
The first partial is always 
kept at full volume,
which keeps the base 
octave intact.
Adding every partial in 
series will replicate a 
sawtooth. Note how the 
volume decreases for 
each partial, creating a 
natural fallo.
Adding every odd partial in 
series will approximate a 
squarewave.
This method can be used 
to make all sorts of timbres.
This for example sounds 
close to a bell tone.
Adding every odd partial in 
series will approximate a 
square wave.
The first partial is always 
kept at full volume,
which keeps the base 
octave intact.
Adding every partial in 
series will replicate a 
sawtooth. Note how the 
volume decreases for 
each partial, creating a 
natural fallo.
Adding every odd partial in 
series will approximate a 
squarewave.
This method can be used 
to make all sorts of timbres.
This for example sounds 
close to a bell tone.
The additive method can be 
used to make many dierent 
timbres. This combination of 
partials, for example, sounds 
close to a bell tone.
The first partial is always 
kept at full volume,
which keeps the base 
octave intact.
Adding every partial in 
series will replicate a 
sawtooth. Note how the 
volume decreases for 
each partial, creating a 
natural fallo.
Adding every odd partial in 
series will approximate a 
squarewave.
This method can be used 
to make all sorts of timbres.
This for example sounds 
close to a bell tone.
A.7 SYN1 PAGE 1 PARAMETERS OVERVIEW
Here is a graphical overview of what part of the FM engine the parameters on the SYN1 pages aects. The 
aected part of the FM engine is highlighted with grey. For more information, please see “11.3 SYN1 PAGE 1” 
on page 46.










