Here's a better example of my newly built Passive Low Pass Gate acting in a real patch.
The Chord Organ by Music Thing Modular is a great VCO to use here, the bouncy echoes come from the sound being run through the LPG, which is being driven by triggers from the Doepfer A160-2 clock divider. The clock source and echoes are the 4MS Dual Looping Delay.
Other incidental sounds appear from several additional sound sources, including the Benjolin that is driving other sequencers and gates.