KQ MiniSynth – Filters/Effectors

This is a module which contains “Low-pass filter”, “High-pass filter”, “Band-pass filter”, and “Band-elimination filter”.

Connectors/Parameters

• LPF/HPF/BPF/BEF button

  Select a filter type.

• Frequency

  A cutoff frequency of LPF/HPF or a center frequency of BPF/BEF.

• CV

  Select a source to input the Control-Voltage to control the filter strength;

• V/Oct

  Select a pitch source to track.

• Tracking

  A rate of which the frequency follows the input pitch.

• Resonance / Width

  A strength of the resonance of LPF/HPF or the frequency width of BPF/BEF.

• Wave In

  Select a source to input a wave.

• Wave Out

  This outputs a wave.

This only modifies the input phase.
The changes around the specified frequency are like this:
90 degrees when Steps is 1,
180 degrees when Steps is 2,
and 900 degrees (180 degrees) when Steps is 10.

When synthesized with the input wave, waves that are 180 degrees out of phase cancel each other, creating a special effect.

Connectors / Parameters

• Frequency

  Set the frequency at which the phase is to be varied to the maximum.

• KBD CV

  Connect the V/Oct of the keyboard here and the frequency will follow.

• Tracking

  KBD CV tracking ratio.

• Steps

  Set the order of the filter.

  The phase change is as follows:
  When Steps is 1, 90 degrees around the frequency, and 180 degrees around the nyquist.
  When Steps is 2, 180 degrees around the frequency, and 360 degrees (1 cycle) around the nyquist.
  When Steps is 8, 720 degrees (2 cycles) around the frequency, and 1440 degrees (4 cycles) around the nyquist.
  When Steps is 24, 2160 degrees (6 cycles) around the frequency, and 4320 degrees (12 cycles) around the nyquist.

• In

  Input wave.

• Out

  Output wave.

This is a module which amplifies the input wave by Level, applies a Low-pass filter and outputs it.

Connectors / Parameters

• Wave In

  Select a wave source to amplify.

• Level

  Select a Level source.

• Cutoff

  A cutoff frequency level.

• Resonance

  A strength of the resonance

• Wave Out

  This outputs a wave.

This is a effector which delays sound.

Connectors/Parameters

• Time

  Time to delay.

• Dry

  Volume of the raw input sound.

• Wet

  Volume of the processed sound.

• Feedback

  Volume of the feedback sound.

• In

  Select a source to effect.

• Out

  This outputs the effected.

You get a effect (e.g. chorus, flanging) by modulating delay amount.

Connectors/Parameters

• Mod CV

  Select a source of modulation. Usually, LFO is recommended.

• Min/Max Delay

  The maximum/minimum delay time. I recommend that the minimum value is about 20ms for Chorus, 0ms for Flanging.

• DryWet

  Dry means the unprocessed sound and Wet means the processed one. The output is only Dry if the value is 0, only Wet if the value is 1.

• Feedback

  The delay’s feedback amount.

• In

  The input.

• Out

  The output.

This is a filter which adds the reverberation to the input sound. The algorithm is original. Stereo Input/Output.

Connectors/Parameters

• Level

  A level of the reverberation.

• Wave In

  Select a source to input a wave.

• Wave Out

  This outputs a filtered wave.

This is a filter which adds the reverberation to the input sound. This module uses FreeVerb which is a public domain high quality reverbrator. Stereo Input/Output.

Connectors/Parameters

• Room Size

  The level of refrected sound. It is reflected longer time if the value is larger.

• Damp

  Damping it more if the value is larger.

• Dry

  The level of the unprocessed sound.

• Wet

  The level of the processed (reverberated) sound.

• Width

  Stereo sound width.

• Freeze

  Fixing the reverbration when this become on. You can control it with a connected cable.

• In

  The input.

• Out

  The output.

This is a module which compresses the dynamic range of the input sound.

Connectors/Parameters

• Thresh

  A threshold to compress.

• Ratio

  A compressing ratio.

• Attack

  Time before beginning compressing after the volume ≥ “Thresh”.

• Release

  Time before finishing compressing after the volume ≤ “Thresh”.

• Gain

  A value for changing the output volume.

• Wave In

  Select a source to input a wave.

• Wave Out

  This outputs the compressed.

Using Chorus effect, you get a sound like people singing in a chorus. This module overlaps a input and a processed input whose frequency is modulated. Internally, it uses a Modulated Delay. Stereo Input/Output.

Connectors/Parameters

• Frequency

  Chorus vibration frequency. The vibration gets faster if the value is larger.

• Depth

  Chorus vibration depth. The vibration gets deeper if the value is larger.

• DryWet

  Dry means the unprocessed sound and Wet means the processed one. The output is only Dry if the value is 0, only Wet if the value is 1. You feel only vibration effect if the value is 1 because chorus effect is a result of overlapping.

• Feedback

  The internal delay’s feedback amount.

• In

  The input.

• Out

  The output.

Flanger is a effector which produces sweeping up/down sound. Stereo Input/Output.

Connectors/Parameters

• Frequency

  Flanger viblation frequency. The viblation gets faster if the value is larger.

• Depth

  Flanger viblation depth. The viblation gets deeper if the value is larger.

• DryWet

  Dry means the unprocessed sound and Wet means the processed one. The output is only Dry if the value is 0, only Wet if the value is 1. You feel vibration effect if the value is 1.

• Feedback

  The internal delay’s feedback amount.

• In

  The input.

• Out

  The output.

This module rounds and sample the input and make destorted sounds.

Connectors / Parameters

• In

  Select sources as input.

• Bit Depth

  Set the rounding accuracy.

• Sample Rate

  Set the sampling frequency.

• Out

  The processed output.