GENERATORS

Sytrus - The Filter Module

Settings

Filter Mode

• Filter Type LCD - Select from one of 12 filter types - included are a full-featured SVF 'Chocolate' filter and 8 'Vanilla' filters (Low Pass - LP, Band Pass - BP, Notch - NOT, High Pass - HP, All Pass - AP, Low Shelf - LS, Peaking - PK and High Shelf - HS) and a lowpass 'Mango' filter. Only the SVF filter will display/use the low/band/high levels on the panel (see the screenshot above).
• Flat - Select this to apply alternative resonance algorithm for the filter (you will need to try both modes to see which fits your project needs better).
• HQ - Improves the filter quality. This option is primarily needed when operating at sample rates of 44kHz or less and using the high-pass result of the SVF filter.
• Bandwidth - Sets the filter bandwidth. OFF turns the filter off. x1, x2, x3 are 12, 24 and 36 dB filters respectively. ALT x2 and ALT x3 provide alternative algorithms for the 24/36 dB filter modes.

Common Filter Settings

These settings control some common aspects of the filter (cutoff, resonance etc.)

• Cutoff LFO/Env. Amount (ENV) - The influence amount of the cutoff LFO/Envelope articulation section over the cutoff value. Turn maximum to left to practically disable the cutoff articulation.
• Cutoff (CUT) - The filter frequency for the filter (this setting affects all modes of the filter - low, band high etc.).
• Resonance (RES) / Bandwidth - The resonance or "sharpness" of the filter. In the case of a bandpass/notch filters, this knob sets the filter band's width.

Low/Band/High Levels

These settings are visible and apply only to the included SVF filter. Each slider controls the output amount of one of the filter bands: L: low-pass, B: band-pass, H: high-pass.

By default, the low-pass level is set to maximum while the rest are muted.

WaveShaper Settings

Each filter module includes an optional waveshaper distortion. This distortion maps the input signal amplitude to another amplitude based on the waveshaper mapping (check in the articulation section below).

To enable the effect, turn on the Enabled LED.

• Unipolar/Bipolar (+ / +-) - Allows you to set the waveshaper graph to symetric (unipolar) or asymetric (bipolar). This option will affect the waveshaper envelope presentation (switching from bipolar to unipolar mode will lose all the asymetric information).
• Preamp (AMP) - Allows you to increase the amplitude levels of the signal before it is processed with the waveshaping distortion.
• Mix Level (MIX) - Sets the mix balance between the unprocessed and distorted signal.

Send to Next

This knob allows you to send the audio processed by the current filter module to the next one.

The feature is available only in the first 2 filter modules.

Articulation Section

The articulation section allows you to apply an envelope, LFO, map keys, velocity or unison mode voices to a set of predefined properties. To see the full list of envelopes/mapping in the articulation section and their meaning, please check the envelope editor page.

The filter mode supports the following articulation targets (controlled parameters):

• Panning (PAN) - Sets the filter output panning (graph bottom = left panning, graph top = right panning).
• Volume (VOL) - Sets the filter output volume (graph bottom = no output, graph top = maximum output).
• Cutoff (CUT) - Offsets the cutoff levels for the filter (graph bottom = -100 offset, graph top = +100 offset).
• Resonance (RES) - Offsets the resonance levels for the filter (graph bottom = -100 offset, graph top = +100 offset).
• Low-pass, Band-pass, High-pass Levels (LOW, BAND, HIGH) - Sets the output volume of the corresponding filter mode (graph bottom = no output, graph top = maximum output).
• WaveShaper Mapping (WS) - This is the only articulation target without a full set of envelopes, LFO etc. - since this is simply a map describing the relation between the input audio amplitude and the waveshaper processed signal. The horizontal direction represents the input levels (left>right = min>max) while the vertical direction represents the output levels (bottom>top = min>max).
• WaveShaper Mix Level (WMIX) - Sets the output volume of waveshaper processed signal (graph bottom = no distortion mix, graph top = maximum distortion mix level).