FoMO: Fold Modulation Operator
This is a new take on FM, where the F is folding. Each operator has a variable duty cycle triangle/saw oscillator core which is run through a carefully calibrated wave wrapper and wave folder. You can set your ratios and make some algorithms and enjoy some beautiful moving timbres by running folded signals into the fold modulation and wave wrap inputs.
A square wave output is made available for clean hard sync sounds and making looking at waveforms easier on an oscilloscope.
I/O
| Input | Signal Range | Notes |
|---|---|---|
 |
-1 to 1 |
Modulation/envelopes or audio can be sent to wave wrapper input |
 |
-1 to 1 |
Modulation/envelopes or audio can be sent to the fold modulation input |
 |
zero crossing |
Hard sync, works best with square wave |
 |
-5 to 5 |
1/oct input |
| Output | Signal Range | Notes |
|---|---|---|
 |
-.5 to .5 |
the signal had been attenuated intentionally |
 |
-1 to 1 |
This output is the combined output of the WW, FF, and oscillator core |
Controls
| Knob | Function | Notes |
|---|---|---|
 |
Core waveform symmetry |
Proceeds from saw to triangle to ramp |
 |
Core waveform fold amount |
Full clockwise is makes a ramp wave and sine wave that is one octave up in pitch |
 |
Wave wrap input attenuator |
|
 |
Fold modulation attenuator |
|
 |
Pitch ratio |
useful for making sonorous FM algorithms. |
Display
| Meter | Name | Notes |
|---|---|---|
 |
ratio display |
Square wave is also affected by this ratio. |
Version History
| Revision | File | Date | Notes |
|---|---|---|---|
| 1.2 | FoMO V1.2.audulus (30.5 KB) | 5/21/2018 | Changed to FoMO (thanks @RudigerMeyer) to differentiate more from FM synthesis |
| 1.1 | supersceeded | 5/20/2018 | Initial Upload |
Demos
| Revision | File | Date | Notes |
|---|---|---|---|
| FoMO chordal demo patch 1.2 | FoMO chordal demo patch 1.2.audulus (1.2 MB) | 5/20/2018 | Updated patch to current version of FoMO |
| Chordal Demo Patch | superceeded | 5/20/2018 | This demo contains an experimental sequencer too, just for fun. |
