Growl
harmonic synthesizer

gin tonic
Partials Advanced
1
24
Lissajous (lee-SAH-zhoo) — plots L vs R. Line = mono, ellipse = stereo, loops = phase between partials.
partials
scale
ⓘ
Tuning
compress stretch
just equal
off thick
Output
sum
narrow wide
clean hot
auto
off full
L R
Settings
±1 ±24
BPM
-50¢ +50¢
mono
Overtone Scan
on
remove isolate
sweep step
range
1
24
off cut
retrig 1-shot
Filter
on
20kHz
dark open
shelf peak
off strong
poly
Harmonic Gate
on
capture follow split
Noise
on
dark bright
Sculpt
on
saw sqr tri pulse
Envelope
on
VCA
VCF
Effects
on
on
on
on
Modulation
rate 2.0Hz sync
depth
delay
1-shot invert
Looking for MIDI devices…
About

What is this? An additive synthesizer that builds sounds from individual harmonics instead of subtracting from a waveform. The fold slider crossfades between octave layers. The scanner sweeps a spotlight across the harmonic series. The harmonic gate reinforces partials that match a chord.

Built by Beat Kitchen School — live music production and audio engineering workshops.

Activate License
Want this in your DAW?
VST3 & AU for Mac and Windows
BK Harmonic — VST3 & AU plugin
Beat Kitchen Plugin
Growl
harmonic synthesizer
Everything you hear in the browser, running as a proper plugin in your DAW. Tighter, more reliable, and built to handle a real session.
VST3 (Mac + Windows) AU (Mac) 24-partial additive Fold crossfade Overtone scanner Harmonic gate 6-source mod matrix Shared preset format 8-voice polyphonic Per-voice filter
Today's price
The price goes up every day. Yours is locked in at purchase.
Buy on plugin page →
Early adopter heads-up: If you're purchasing within the first two weeks, there may be some snags while we figure out how to get everyone installed properly. Bear with us — we'll get you up and running.
This is a beta. You get every update, every new feature, every fix — from now through v1.0.
Beat Kitchen residents: You already have access. Open the plugin and enter your Discord username to activate.
More from Beat Kitchen
Free Electronic Music Production Guide
Synthesis, sound design, arrangement — start here.
Programs & Workshops
Live, small-group classes in production, mixing, and music theory.
Free Tools
Chord Wheel, Harmony Wheel, and more interactive instruments.
© 2026 Beat Kitchen School · beatkitchen.io