Yoshimi User Manual ~ Effects

## Effects

Effects can be applied to single instruments or as master effects.
Most effects have a Preset dropdown which allows to select some 'factory' preset.
For any effect, if you select a preset and then change parameters this dropdown will become blue to remind you the preset has changed.
Note that for some effects, the D/W (Dry/Wet) parameter when editing the effect for a single instrument becomes a Vol (Volume) parameter when applied as Master effects. These are controlled from the Main window. In this section we always refer to D/W.

### Reverb

- Preset: select a default preset and set paramters accordingly
- Type: This selects the reverb type:
  - freeverb (default) is the well-knnown freeverb reverb type.
  - bandwidth has the same parameters for the comb and allpass filters, but it applies a unison beforethe LPF/HPF. The unison’s bandwidth can be set using BW. this should be explained better (taken from the PDF user guide)
  random will randomize comb and allpass each time the type or roomsize is being changed ??
- R.S.: Room Size (%)
- D/W: Dry/Wet balance. If completely to the left only the dry sinal (no reverb) will be heard
- Pan: The left/right panning (panorama) for the effect
- Time: Reverberation time
- I.del: Initial delay (also known as pre-delay)
- I.delfb: Initial delay feedback
- BW Bandwidth - only available for type bandwidth
- E/R: [not yet implemented] Early reflections
- LPF: Low Pass Filter. This will cut frequencies above the selected value
- HPF: High Pass Filter. This will cut frequencies below the selected value
- Damp: Amount of damping of low frequencies

### Echo

- Preset: select a default preset and set paramters accordingly
- D/W: Dry/Wet balance. If completely to the left only the dry sinal (no echo) will be heard
- Pan: The left/right panning (panorama) for the effect
- LRdl.: Delay between left and right. This can effectively be used to create a 'stereo echo/delay' effect
- LRc.: Left/Right crossover. This defines how echos cross left to right. Or the how the delays are 'spread' over the stereo (left/right panorama). To hear a difference there also needs to be a non-zero value in the above LRdl. parameter
- Fb.: Feedback value for the echo. The higher the value the more repeats are generated
- Damp: Dampening of high frequencies

### Chorus

- Preset: select a default preset and set paramters accordingly
- Subtract Inverts the outpit if selected
- D/W: Dry/Wet balance. If completely to the left only the dry sinal (no chorus) will be heard
- Pan: The left/right panning (panorama) for the effect
- Freq: LFO frequencey
- Rnd: Randomness of LFO frequency
- LFO Type: Waveform of LFO (Sine / Tri[angle])
- St.df: Stereo phase different for the left/righ LFO
- Dpth: Depth of the LFO
- Delay: Delay of the chorus. Low depth and delay will give a flanger effect
- Fb: Feedback
- L/R: Left / Right effect routing. Leftmost: left to left, right to right; middle: left+right to centre; rightmost: left to right, right to left

### Phaser

- Preset: select a default preset and set paramters accordingly
- D/W: Dry/Wet balance. If completely to the left only the dry sinal (no phaser) will be heard
- Pan: The left/right panning (panorama) for the effect
- Freq: LFO frequencey
- Rnd: Randomness of LFO frequency
- LFO Type: Waveform of LFO (Sine / Tri[angle])
- Depth: Effect depth
- St.df: Stereo phase different for the left/righ LFO
- L/R: Left / Right effect routing. Only available when Analog is not selected. Leftmost: left to left, right to right; middle: left+right to centre; rightmost: left to right, right to left
- Fb: Feedback
- dist: Phaser distortion. Only available when Analog is selected
- Phase: Phase
- Analog: FET (Field-effect transistor) emulation (on/off)
- hyper: Hyper sine mode (on/off). Only available when Analog is selected
- Sub.: Inverts the outpit (on/off)
- Stages: Phaser stages (max 12)

### AlienWah

- Preset: select a default preset and set paramters accordingly
- Phase Phase of the AlienWah effect. This sets the vocal sound between an 'Aahh' and an 'Eehh'
- D/W: Dry/Wet balance. If completely to the left only the dry sinal (no AlienWah) will be heard
- Pan: The left/right panning (panorama) for the effect
- Freq: LFO frequencey
- Rnd: Randomness of LFO frequency
- LFO Type: Waveform of LFO (Sine / Tri[angle])
- St.df: Stereo phase difference for the left/righ LFO
- Dpth: Depth of the LFO
- Fb: Feedback
- Delay: Delay of before the feedback. Low delay will give more of a wha wha effect (0 to 100)
- L/R: Left / Right effect routing. Leftmost: left to left, right to right; middle: left+right to centre; rightmost: left to right, right to left

### Distortion

- Preset: select a default preset and set paramters accordingly
- Pan: The left/right panning (panorama) for the effect
- LRc.: Left/Right mix
- Drive: Distortion (drive) level
- Level: Volume (amplification) level after distortion
- Type: Select the wave for the distortion waveshaping function
- Neg.: Negate (invert) the signal if selected
- LPF: Low Pass Filter. Blocks frequencies above the selected frequency
- HPF: High Pass Filter. Blocks frequencies below the selected frequency
- PF: Pre Filter. If selected the LPF and HPF are applied before distortion
- St. Stereo. If selected the effect is stereo, otherwise mono

### EQ

This effect provides a visual representation of the EQ curve as shown in the screenshot. The horizontal axis represent frequencies and the vertical represents amplitude. The yellow line shows how the signal will be filtered (equaliszed).

- Gain: Gain of the equalised signal
- B.: Band number. The EQ effect providse up to 8 'bands' each of wich can be an independent filter (they are numbered 0 to 7)
- T.: Filter type for the selected band.
- Freq: Filter frequency. Depending on the type of filter this can be the cut-off or centre frequency.
- Gain: Gain for the filter, if foreseen by the type of filter (e.g. peak, high-shelf, low-shelf)
- Q: Q factor for the filter. Depending on the type of filter this can be the 'resonance', 'width', etc.
- St.: Number of stages for the filter (0 to 4). Typically, the more the stages the more 'drastic' ('steep') the filtering around the center/cutoff frequency

### DynFilter

The DynFilter is actually made of two effect stages, the main effect and the filter control accessible via its own pannel by clicking on the 'Filter' button.

#### Effect parameters

- Preset: select a default preset and set paramters accordingly
- D/W: Dry/Wet balance. If completely to the left only the dry sinal (no DynFilter) will be heard
- Pan: The left/right panning (panorama) for the effect
- Freq: DynFilter LFO Frequency
- Rnd: Randomness of the LFO Frequency
- LFO Type: Waveform of LFO (Sine / Tri[angle])
- St.df: Left/right channel phase shift for the LFO
- LfoD: LFO Depth
- A.S.: Amplitude Sensing. Defines how much the amplitude influences the effect check
- A.M.: Amplitude Measurement, i.e. how the RMS value of the amplitude is measured. The higher the value the slower the filter will react
- Inv. Invert (negate) the absolute RMS value effectively lowering the filter frequency

#### Fitler parameters

These paramters are the same as the Filter Type ones. Here, of course, the