Though this is a long post, most of the basic concepts are repeated again and again, so once you have understood the first few edit procedures it is dead easy after that.
So don't be discouraged. And don't let anyone tell you that programming a DX7 requires a degree in rocket science. They have probably never owned a DX7 or tried to program one.
The take home concept to know is that by varying the pitch frequency, modulation, and envelope data , it is possible to edit pre-programmed voices or to create entirely new voices.
Press the purple Edit/compare Function button on the extreme left to enter EDIT MODE
Setting and modifying parameters is done with the DATA slider
A small dot will appear next to the voice number if any data is modified.
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Operator On/Off
There are 6 operators - numbers 1 to 6
In edit mode pressing these keys will turn them on and off,
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EG copy
This copys the envelope data from one operator to another.
Use the store key
Algorithm
Press Key 7
Use the Data entry key +1 & -1 or the slider to increase/decrease value to select one of the 32 algorithms.
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Feedback
Press Key 8
Choose an algorithm with a feedback loop.
eg:
The range of feedback : 0 to 7.
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LFO
Use Keys 9,10,11,12,13.14.to set the LFO parameters.
Once the paramets are set, you can use the mod wheel, a breath controller, aftertouch etc
to apply the LFO effect.
9. Wave
There are 6 waveforms
10. Speed
This sets the frequency of the LFO
You use the data slider to select the frequency
11. Delay
Sets a delay between the pressing of a key and onset of LFO modulation.
0 = no delay
99= longest delay
You use the data slider to select
12. PMD -
Pitch modulation depth
This is independent of the controller settings
0= no pitch mod
99 = max pitch mod
You use the data slider to select
13. AMD
Amplitude modulation depth
0= no amp mod
99 = max amp mod
This is independent of the controller settings
You use the data slider to select
14. Sync
Either on or off
Pressing the sync button
alternately will turn it on or off.
on= modulation begins when key is pressed
off = the LFO is free running and modulation commencement is random.
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Mod Sensitivity
15. Pitch
16. Sensitivity
Pitch: range 0 to 7
It sets the modulation sensitivity to all operators
Amplitude : range 0 to 3
Amp modulation is independent for each operator.
It creates "wow effects for modulator operators.
It creates tremolo effects for carrier operators,
You can select the operator using the operator select key
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Oscillator
17. Mode/Sync
18. Frequency Coarse
19 Frequency Fine
20. Detune
17. Mode / Sync
Pressing button 17 will cycle between mode & sync
Frequency Ratio -- operator pitch is scaled to the keyboard was you'd expect.
Fixed Freq - a fixed freq is produced no matter which key is pressed.
(frequency is set using buttons 18/19)
Sync -
ON = oscillators begin at phase 0
18. Frequency Coarse
19 Frequency Fine
...
20. Detune
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EG - The envelope generator
Buttons 21 & 22
For more detailed info see here
The EG controls volume and/or timbre - depends if its effecting a modulator or a carrier.
Modulator -- timbre
carrier - volume
The shape of the envelope is controlled by levels & rates
Pressing button 21 will cycle through each rate (1 - 4)
Use the slider to set the amount of rate.
Pressing button 22 will cycle through each level (L1-L4)
Use the slider to set the amount of level
The envelope can be set individually to each operator.
Use the z button to choose operators
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Keyboard Level Scaling
Buttons 23, 24, 25
Allows you to choose a keyboard break point and make a envelope to the left & right of this point.
You have control of the envelope shape (curve & depth).
For more detailed info chick here
The Breakpoint can be anywhere between A1 and C8
There are 4 different curves available:+/- exponential and +/- linear.
Depth varies between 0 and 99
0=flat
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Keyboard Rate Scaling
Button 26
Range is 0 to 7
0 = short treble decay link an acoustic piano
7 = long bass decay
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Operator
Buttons 27, 28.
Sets the output levels & touch response levels of each operator.
(each operator has its own envelope)
Output level range: 0 to 99
Use the z button to choose the operator.
The Key velocity = key touch response.
This can be applied to carriers and modulators ... so it effects more than just volume.
You can effect timbre !
Range : 0 to 7
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Pitch EG
Buttons 29, 30
Just like the other DX7 envelopes you have Rate & Level settings
Pressing the RATE button successively will scroll through rate settings R1 , R2, R3, R4.
The same idea applies to the LEVEL button
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Key Transpose & Voice Name
Buttons 31, 32
31. Key Transpose -- transposes pitch over a +/- 2 octave range.
(Semitone steps) with C3 as standard.
For example, to transpose up one octave hit KEY TRANSPOSE and then press C4.
32 Voice Name
Max of 10 characters.
To edit a name:
a) Press VOICE NAME
b) Hold the Character button and scroll through the letters/numbers
You move along the LCD with the +/- buttons.
c) Use the 32 green membrane buttons to enter the name. Numbers 0-9 and letters A to V.
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