Sometimes you need a special module to control Filters or Oscillators.
TD_EnvFollow_A
Envelope Follower Type A
This is a simple envelope follower based on “traditional” analogue effects pedal design. This module does not do any filtering, you will need to connect a filters cut off control to the output plug!
The input is internally rectified, so you also save a module in the process.
The attack and release time pins only update at SE’s internal block-rate.
Note: This is a typical type of envelope follower found in guitar pedals and some High-End compressors. The release time should always be much larger than the attack time, otherwise the envelope following isn’t very accurate. If the release time is too short the effect it is being used in will produce distorted audio due to the input waveform modulating the output (which is how the original effects pedal would normally behave).
Typical Envelope follower application:
TD_EnvFollow_B
Envelope Follower Type B
Notes:
A simplified envelope follower based on traditional analogue design techniques.
The input is internally rectified – so you also save a module in the process.
Attack and Release time pins only update at SE’s internal block-rate.
For the technically inclined:
This topology is unique because internally it releases before it attacks.
The actual release time is T-attack + T-release, but usually attack is much shorter than release so this isn’t very audible, it does however reduce intermodulation distortion more than the regular switched coefficient method.
The native SE envelope is a switched coefficient type, as is all other. This method does change the release trajectory somewhat. This does not use TPT/ZDF but the Step Invariant method instead to realize the topology.
TD_Quantizer
Mono voltage quantizer.
Notes: Suitable for control voltage or audio-rate signals. The module quantizes the input voltage according to step size, that is it constrains the input voltage change to pre-set steps of the value specified. Minimum step size is 0.0000001V. This module uses less CPU than the stock SynthEdit version.
TD_Quantizer_ST
Stereo voltage quantizer.
Notes: Suitable for control voltage or audio-rate signals. The module quantizes the input voltage according to step size, that is it constrains the input voltage change to pre-set steps of the value specified. Minimum step size is 0.0000001V. This module uses less CPU than the stock SynthEdit version.
TD_Contour
Voltage contour modifier, select for a list of pre-set formulae.
Notes: The easiest way to see what the modes do, is to connect a sawtooth wave of +/- 5 volts to the input and then check it on a Scope. Predominantly made to alter the response of a VCA (use with Level Adjust), but can be used for other things too.
Modes:- Thru, Mirror, Clip0/10, Expo1, InvExpo1, Expo2, InvExpo2, Expo3, InvExp3, Square, InvSquare, Log1, InvLog1, Log2, InvLog2, Log3, InvLog3, Sqrt, InvSqrt, Pow.25, InvPow.25, Scrv, InvScrv, SqrScrv, SqrInScrv, Gate40, Gate34.
TD Curver.
Control voltage curve modifier.
Input voltage: the range is within the 0 to10 Volt Range. This input is internally clipped to these levels..
Curve Amount: the range here is also 0 to 10 volts. 5 Volts = Unchanged input signal appears at the output.
Again the easiest way to see the effect is to experiment using a sawtooth input and a ‘scope on the output. Some of the results I have obtained are shown below
TD_PeakHold
Peak Hold Filter
Notes: This module is generally used as a Peak hold for GUIs, and is not recommended for audio use. (You need to use a DSP-GUI bridge or Patch Mem)
TD_PeakHold_ST
Stereo peak hold filter
Notes: Generally used as a Peak hold for GUIs, and is not recommended for audio use. (You need to use a DSP-GUI bridge or Patch Mem)
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