- Choose LP (low pass) filter with Cutoff to 60 Hz.
- Set Resonance to self oscillation.
- Set Trigger Mode to Pulse trigger.
- Adjust Decay and Env Mod to get the right sound.
Source: 2-Pole Analog Filter — waldorf-2pole.raw (manual)
Source: 2-Pole Analog Filter — waldorf-2pole.raw (manual)