UK-style wobble-zap bassline business. This one is a simple single oscillator jobby with lashings of dubby tape echo and spring reverb.
Start with a single square wave and crank up the resonance on a 24dB low-pass filter to a notch below self-oscillation. Lower the filter cutoff and set the filter envelope to around two-thirds to three quarters depending on your synth. Set the filter ADSR to A=40%, D=40%, S=0% and R=66%.
Listen: Roots Manuva - Witness (1 Hope)
How to get the sound
We’re putting Rob Papen’s Predator to task for this one. Set velocity to modulate the cutoff point at around 60% and draw in the three-note sequence. Make the first note have the highest velocity, the second note a bit less and the third note a bit less still. Complete the rest of the sequence with these velocity values so that it maps out the whole riff.
The last bit of filter modulation comes from the LFO. Set that to 1/16 BPM sync, and select a saw up waveform. Dial up a negative modulation value of around 50%, just until you hear the ‘whomp’ kick in.