INSTRUMENTS / GENERATORS
Sytrus - The Filter Module
The Filter Module has 13 filter
modes and many options that you can tweak to get the perfect sound for your project. It includes a complete articulation section that allows you
full control over the filter parameters. The module also includes waveshaping distortion with customizable mapping.
The SVF filter is capable of handling 3 filter modes simultaneously - low-pass, band-pass and high-pass.
NOTE: The Filter Mode switch is automatable.
Filter Mode (Automatable)
- Filter Type LCD - Select from one of 13 filter types, including a fully-featured SVF 'Chocolate' filter, 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). A Phaser filter (PHS) is also included (see below).
- Flat - Applies an alternative resonance algorithm to the filter (try both modes to see which suits your project).
- HQ - Improves filter quality. This option is necessary when operating at sample rates of 44 kHz 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.
The Cherry Phaser is implemented as a filter type (see above) giving you full control of the frequency and enabling the phaser
to be synced to the LFO, with full control of the LFO shape.
- Res - Phaser feedback.
- Filter Mode - Phaser order. The buttons marked 1 to ALT x3 provide phaser order 1 to 10. To keep the interface simple ALT x2
and ALT x3 are orders 4 & 5. The 'FLAT' switch adds 5 to these buttons giving you 6 to 10 on the same switches. For example, FLAT + x1 = 6,
FLAT + x2 = 7 ... FLAT + ALT x3 = 10.
Common Filter Settings
These settings control some common aspects of the filter (cutoff, resonance, etc.)
- Cutoff LFO/Env. Amount (ENV) - Adjusts the amount of cutoff LFO/Envelope articulation above the cutoff value. Turn fully left to
disable cutoff articulation.
- Cutoff (CUT) - Filter frequency. Affects all modes of the filter - low, band, high, etc.
- Resonance (RES) / Bandwidth - Sets the resonance or "sharpness" of the filter. For bandpass/notch filters, sets the filter
These settings apply to the included SVF filter only. Each slider controls the amount of output from each 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.
Each filter module includes an optional waveshaper distortion. This distortion maps the input signal amplitude to another amplitude based on the
waveshaper mapping (see 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). Affects the
waveshaper envelope presentation (switching from bipolar to unipolar mode loses 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 signals.
Send to Next
This knob allows you to send the audio processed by the current filter module to the next one. This feature is available for the first two filter
The articulation section allows you to apply an envelope, LFO, map keys, velocity or unison mode voices to a set of pre-defined properties.
For a full list of envelopes/mapping in the Articulation section and their descriptions, see 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 filter resonance levels (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. It is simply a map
describing the relation between the input audio amplitude and the waveshaper processed signal. The horizontal axis represents the input levels
(left>right = min>max) while the vertical axis represents the output levels (bottom>top = min>max).
- WaveShaper Mix Level (WMIX) - Sets the output volume of the waveshaper processed signal (graph bottom = no distortion mix, graph
top = maximum distortion mix level).