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4. Classic Moog bass using Diva’s filter overdrive
1 Original Minimoog owners discovered that plugging the output of the synth back into the external input would overdrive the filter and add gnarly aggression to the sound. Diva recreates this feature perfectly – let’s take advantage and create a classic Moog-style bass. Create an instance of Diva and load the INIT Minimono template.
2 We’ll set up the oscillators first. Drop Oscillator 1’s Range control to 16', lowering the pitch by one octave. Next, thicken the sound out by adding in Oscillator 2. First off, turn up Oscillator 2’s Volume to 70 so we can hear it. Turn the Range control down to 16' to match the pitch of Oscillator 1.
3 Turn oscillator two’s Waveform dial to 8. This changes the waveform to a square wave, roughening things up a bit. Now add in Oscillator 3 by turning its Volume dial up to 70. As this oscillator is pitched an octave higher than the other two, it’ll bring a bit of clarity to the notes, so leave the pitch set to the default 8'.
4 Time to overdrive the sound with feedback! Grab the Feedback dial and turn it to 100 to hear the signal distort. While we’re here, turn the Noise dial to 45 to add some extra chaos and dirt into the signal. By distorting and adding noise, we give ourselves a complex signal which is perfect for subtractive synthesis.
5 It’s sounding very harsh, so drop the filter’s Cutoff dial to 70 to remove the top-end fizz, then add resonance by turning the Emphasis dial to 65. We can sharpen the attack by controlling the filter cutoff with an envelope: turn the dial marked Env 2 to 24. Now the filter’s cutoff dial will respond to envelope 2.
6 Change ADS Env 2’s Attack to 15 and Decay to 40. Older monophonic synths favoured low notes over high, meaning if a low note was held a higher note wouldn’t sound – we can change this in the Main panel by setting Note Priority to Last. Finally, change Mode from Legato to Mono to force the envelope to retrigger each time we hit a note.