FXpansion EtchRed User Manual

Page 4

Etch Operation Manual

Etch Red Audio path

The Drive, Filter and Output modules form the heart of Etch Red. By default, the Drive is placed
before the filters in the signal path, although their order can be swapped using the Post button on
the Drive module.

Each Filter module features 4 selectable filter types, each with a varied set of responses. There
are dedicated key tracking and audio-rate FM functions, and the filters can be placed in parallel
and panned left/right for true stereo filtering.

The Output module features final level controls for both filters, a simple but very effective 1-knob
compressor and final output level and panning controls.

Etch Red Modulation

Using TransMod modulation in Etch

1.Select one of the 10 available modulation sources as the

c u rre n tly v ie w e d source (LFO1

is selected by default)

2.Each parameter in Etch Red that can be modulated has an accompanying red

T ra n s M o d

a m o u n t k n o b which sets the modulation depth from the c u rre n tly v ie w e d TransMod

modulation source.

The red knob is bi-polar - it can introduce positive or negative modulation from the
value set by the parameter's main knob.

Each TransMod source features its own set of modulation depths to each parameter: a parameter
can be modulated by any number of the 10 available sources simultaneously. The TransMod system
is discussed in detail in chapter 3.

TransMod Modulation sources

Etch Red features 5 built-in modulators: a triggered Envelope, 2 LFOs, an envelope Follower and a
Sample & Hold (S&H). All are intended to be used with the TransMod system, although as
mentioned, the LFOs feature a direct FM routing to each filter cutoff. The level of each modulator
can be controlled by another modulation source, by modulating its Gain control. This is very useful
for dynamic, evolving modulation shapes.

Although Etch Red features a number of built-in modulators, there are a number of other sources
which are derived from the inputs on the rear panel.

Etch Red also features two additional modulation functions
which operate outside the TransMod system:

Filter FM

The Filter FM function features a direct modulation routing
from LFO1, LFO2 or the FM Override external inputs on the
Etch Red rear panel. The depth is set by the FM knob on each
filter, which can itself be modulated via the TransMod system.
The filter FM function can operate at audio rates, unlike the
TransMod system which is quantized to control rates.

Filter Key Track

The Filter Key Track function allows you to 'play' Etch Red's filters using MIDI keyboard input via
Reason's sequencer or from other modules such as the Matrix sequencer.