gentle engine is a iteration of bluewhale circuit. With an addition of another oscillator mixing, it created granular but rhythmical sound. They resemble an idling engine when it gets a gentle light. With full sun, the voice becomes rhythmical and higher pitched cry.

gentle_engine was constructed from upside down the chip. Parts are soldered upwards as if they were growing out of them. Treating the arrangements of parts like a flower arrangements, gentle_engine is classified with style of bonsai