I'll add to this as I explore the synth.
Please let me know if I have made any mistakes or omissions.
There are 6 levels (menus)
1. Feedback & Algorithm selection
2. Frequency ratios and operator tuning / detuning
3. ADSR Envelopes
4. LFOs
5. SSG envelope generator
6. patches/presets & midi channels
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1. Feedback & Algorithm selection
There are 2 types of operators: carriers & modulators
Carriers: (you hear these)
Modulators: (they modulate of course)
The left knob controls feedback.
Right knob chooses the algorithm (there are 8 to pick).
Picking the correct algorithm is probably the most important part about FM sound design.
As the chip is from Yamaha I expected the algorithms to be the same as some old Yamaha synths.
I wasn't disappointed.
Below is a chart from a Yamaha DX100.
Now here is my version of the DAFM synth using these same algorithms
On the DAFM Algorithm 4 has 2 modulators & 2 carriers. It's a good one for Bass sounds.
There are 4 main types of algorithm:
a. Stacked... one or more modulators connected in series to a single carrier (algo 0)
(These are used for orchestra sounds ... piano, brass, string)
b. Branched... multiple modulators connected to a single carrier (algo 1, 2, 3, )
This is good for bass sounds.
c. Root.... single modulator connected to multiple carriers (algo 5)
Vibe sound
d. Carrier only .... multiple operators in the carrier position (algo 6, 7)
For pad/drone, organ like sounds, I like to use more carriers and less modulators. ... thus use DAFM algorthm 7. A bit of detuning between the carriers can thicken things up. Think of each operator as different organ “stops,” which can be mixed togetheras desired
For something bell / metallic, I tend to go for something with two modulators and a carrier.
2. Frequency ratios and operator tuning / detuning
Here you can create some harmonic & non harmonic overtones.
range: 0.5:1 to 15:1
3. ADSR Envelopes
These are amplitude envelopes I think
4. LFOs
You can adjust the LFO for each operator.
5. SSG envelope generator
The SSG (Software-Controlled Sound Generator)
is an NMOS-LSI device designed to be capable of music generation.
This appears to be connected to the ADSR envelope in menu 3 & LFO in menu 4.
It effects how they are repeated.
6. patches/presets & midi channels
You can recall your presets from the RAM or SD card (the left screens)
It looks like you can load/recall 6 presets to the RAM and 6 to the SD card. ???
....
tHIS setting to save to cell 1 (ram)
///This setting to save preset to cell 4 in the RAM
Use this setting to save to SD card
Use this setting to load from SD card
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