Description

This is how I create a simple Doppler effect in Snap Heap. Though rudimentary, this technique is perfect for beginners new to Snap Heap. The approach uses a frequency shifter—while not the most sophisticated method, it’s straightforward. I may explore more advanced techniques in the future.

LFO Clock

1. Begin by creating a bipolar LFO with a Ramp Up curve.
2. Think of this as your master clock for the entire patch.

Gain Curve

1. Create a Remap curve and modulate it with the LFO. This essentially converts the LFO curve to any shape we want.
2. Set the curve to bipolar and draw out a Sine wave like the image below.

1. Map it to a Gain set to % and have it hit 100% at it’s peak.

Macros & Pitch Shift

1. Hook up the LFO rate to a Macro Knob and set the range to something the feels right to you.
2. Duplicate the Remap, sharpen the curve and use it to modulate a frequency shifter. A range of about 2Hz should be sufficient.

If everything is working fine you should get a doppler that sounds something like this. In the video I’ve added an additional low pass filter as well. This is very rudimentary but this patch can be built upon to create some really nice whoohsh and passby effects.