Crazy convolutions

Despite its impulse-based mechanics, convolution can deliver delightfully unexpected outcomes

> Step by step 6. Transform a synth sound into a tearing lead part using Reverberate CM

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Convolving sounds with other sounds is a powerful concept. Here we’ll show you how extreme sounds are within easy reach using two regular plugins and a handful of easily available samples. To get started, load up an instance of Dmitry Sches’ Thorn CM and insert Reverberate CM across the track. 2

To keep things simple we’ve loaded a sequence preset (Seq

Spider), so all you’ve got to do to play this trancy arp is hold down a note of your choice. The sound has some filter sweep in it and plenty of delay and reverb, which you can mute if required, but the underlying synth is pretty clean. 3

Now let’s look at Reverberate CM. By default, this loads with a plate preset, and if you look below the row of knobs you’ll see the file path for the LongPlate.wav file. Looking at the knobs, all of the other settings are pretty standard and we’ll return to these shortly. 4

You can change the underlying impulse by loading any .wav file. The frequency content and envelope of this file will determine the sound imparted on your source audio. For edgy sounds, we like to use short high frequency sounds and a great place to start are hi-hats. 5

In our Suite you’ll find plenty of samples including lots of analogue and digital style hi-hats, but you can of course use any .wav files. Just below the Predelay knob you’ll find the navigation controls to access the impulse files. We’ve loaded the file Digital Hat 01.wav. 6

Set the Wet/Dry to 100% wet, and, if required, boost the IR Gain next to it. To mess with the sound try adjusting the envelope – short Hold times work well here. And to get really dirty, use the Stretch parameter (50% to 150%). You’ll find the more extreme the changes, the more dirty the effect.