RR 11 ECF env Scream4


We'll start by using the concept of the automatic envelope with the trusty ECF-42. Everything must be easily controllable in a song, so we tuck everything neatly away in a Combinator. We start simple and slowly increase the complexity of the patch.

Like all patches in this section, this one too is best used as an insert effect. And to keep everything as simple as possible throughout this section there's only a Dr.Rex routed through the Combinator directly into the Hardware Interface.

The to devices output of the Combinator is routed to a Spider Audio. One split is send through an ECF to a Maximizer and out the Combinator through the from devices input. Nothing unusual here: just a filter and limiter on the audio signal.

The other split from the Spider Audio is routed through a Micromix into a Scream4. There is a CV connection from the Auto CV output on the Scream4 to the Frequency CV input of the ECF.

The Auto CV output of the Scream4 outputs a CV value equal to the level of the audio input of the Scream4. So now the Filter Frequency of the ECF rises as the level of audio input of the Scream4 rises and the Filter Frequency falls as the level of the audio signal falls.

In effect we have created an automatic envelope for the ECF. Something similar to an AutoWah effect.

By adjusting the level of the audio input of the Scream4 we can adjust the amount this automatic envelope controls the Filter Frequency. That’s why we have inserted a Micromix between the Spider Audio and the Scream4.

Rotary 1 and 2 control the Frequency and Resonance of the ECF.

Rotary 3 controls the Master Level of the Micromix, thereby controlling the input level of the Scream4. By doing so it adjusts the amount of the automatic envelope.

Rotary 4 controls the Filter Mode of the ECF. And Button 2 simply switches the softclip on to prevent clipping when using a lot of Resonance.

All in all a simple but useful patch to start with.