FXpansion EtchRed User Manual
Page 10
Etch Operation Manual
10
© 2012 FXpansion Audio
Fatty
The Fatty filter is an OTA-based Sallen-Key filter design, offering low-pass, band-pass, high-pass
and notch Mode settings.
Comb
The C omb filter is great for all sorts of uses, especially lush detune and chorus textures, resonant
special FX and sounds reminiscent of flanging and phasing.
When the C omb is selected, 2 Mode settings are available: negative and positive.
Mode
Each filter Type offers a number of different Mode settings. The number and nature of the modes
available depend on the current filter Type setting.
In
[ w /Tra n sM od a m ou n t]
The In control sets the level of the audio entering the filter. Audio at higher levels drive the filter
harder internally, leading to more saturation and a grittier timbre. Dial this control back in order to
achieve warmer sounds.
Freq
[ w /Tra n sM od a m ou n t]
The Freq control sets the cutoff frequency of the filter. While this parameter features its own
TransMod amount knob, it is also possible to use direct modulation from LFO1, LFO2 or the FM
Override C V inputs using the FM parameter.
Rez (Resonance)
[ w /Tra n sM od a m ou n t]
This control sets the amount of resonance, or emphasis around the cutoff frequency. Higher Rez
settings lead to filter self-oscillation effects.
FM
[ w /Tra n sM od a m ou n t]
The FM control sets the amount of direct filter cutoff frequency modulation applied from the active
FM source.
By default, LFO1 is used for the FM function. This can be changed to LFO2 using the FM LFO
switch. You can also use the Filter1 FM and Filter2 FM inputs on Etch Red's rear panel to use any
audio signal from elsewhere in your Reason session.
FM LFO switch
Each filter's FM LFO switch selects between LFO1 and LFO2 as the FM source, unless the Filter FM
inputs on the rear panel are used.
Pan
[ w /Tra n sM od a m ou n t]
Each filter can be panned anywhere within the stereo field using the Pan control. This parameter
can be modulated for auto-panning effects.
Filter connections
Filter FM inputs
The FM inputs override the LFO1 or LFO2
routing to the filter FM function. These
inputs are optimized for audio-rate
modulation and accept audio signals only.
To modulate the filters with external C V
sources, use the C V1 and C V2 TransMod
source and its associated rear panel inputs.