These are some third party Low Frequency Oscillator Modules specifically designed and optimised for use as an LFO in SynthEdit.
These LFO modules can be downloaded from https://tdmodules.wordpress.com/ as a (free) module pack. The LFO modules in the pack are shown below.
One useful thing about them is the “Off” selection in the waveform list that puts the module to “sleep” thus saving CPU when you don’t need an LFO running.
TD LFO A:
LFOA is the more basic LFO module. The screenshot above shows the LFO modules LFO Type (shape) settings available, and the Plugs.
The plugs are fairly self explanatory:
Rate Hz: controls the tempo of the LFO with a scale of 1V/Hz (Maximum of 500Hz).
Phase: shifts the phase of the LFO. 2.5 volts = 0 degrees phase shift.
Modify: Changes the shape of the waveform. In the case of CRnd it’s a randomly fluctuating smoothed voltage . The best description however is a picture… (worth 1000 words)
Hold: Holds the output voltage at the LFO output value present when the Hold plug voltage is taken above 0 Volts.
Sync: Used to synchronize two oscillators, which can introduce variations into the waveform if the two oscillators are running at different rates.
Note:- The Phase and modify voltages are internally limited to the range -5 to +5 volts exceeding this value won’t cause any problems, it just has no further effect.
The screenshot below shows the effect of using Sync on a sine waveform:
Creating an LFO with the TD_LFO_A module.
There’s nothing too unusual here, the only thing you need to be aware of is the limits on some of the Plug inputs, you can’t “crash” the module, it just won’t respond to excess voltages.
TD LFO_A_ST Synthedit Module
This is just a “doubled up” version of the TD_LFO_A module. The extra plugs are fairly self explanatory. You have a Left and a Right oscillator, hence a Left Phase, Right Phase etc.
Modify Flip does just what you would expect when set to “True”, it just “flips” or inverts the LFO Out R waveform Note: Except for CRnd.
TD_LFO_B LFO Synthedit Module.
The main difference between the A and B LFO’s is extra waveforms:
Off, Sine Saw, Ramp, SawP2, RampP2, Triangle, Trap, Spike, Square, TriSquare, Pulse 25, Fin, FinInv, DblFin, Blip, SineOff, Sine Fold, Dip, Hump, BounceA, BounceB, BounceC, BounceD, Splice2, Splice4, SineUp, SineDown, StepSeq, MultiSeq, CRnd, CRnd Hold.
The best option is to explore these waveforms, some I find are more useful waveshapes than others.
There is also no Modify, or Modify Flip Plug (not needed with so many options)
The TD_LFO_B_ST is essentially like the LFO_A, it’s just a doubled up version with Left and Right outputs.
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