Audio demo - Grumblebum, no external processing
Grumblebum
AUDIO-DRIVEN SYNTH
$5One-time. Yours forever.
Instant download · Stripe secure checkout
Original Release
Version4.1.3
Updated
FormatsAU · VST3 · CLAP · LV2
SystemsmacOS 12+ · Windows · Linux
DRMNone
A stereo effect that uses the incoming audio to drive its internal synth. The results range from a subtle analog accompaniment, to wet analog sounds, to screeching distortion. Try it on drums, vocals, leads, whatever.
What you get
01Instant download from your account
02Universal binary - Mac, Win x64, Linux
03Lifetime free updates & unlimited downloads
04No DRM or key BS - share with your broke buddy
ChangelogView all →
October 19, 2026 - 4.1.3
Post Filter Cutoff automation is smooth in projects saved before 4.1 (legacy filter tuning), not just in new ones
October 19, 2026 - 4.1.3
Percent readouts in hosts and automation lanes show whole numbers (43%, not 43.2107%)
October 19, 2026 - 4.1.3
Frequency readouts show whole hertz below 1 kHz (452 Hz, not 452.0 Hz)
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