version /1.0
formats /VST3, AU, Standalone
price /free
Jonie Pro

A Locked-in Tremolo

Amplitude that follows your session tempo, two more ways to move a signal, and a screen that shows you what it is doing to the audio - not a picture of what it might be doing.

Demos

hear it before you install it

Four clips, rendered straight through Tremmy’s own engine. The source is a Rhodes-ish chord and a plucked figure, synthesised so they are ours to give away.

Slow swell

TREM | sine | 62% depth

Gated 16ths

TREM | square | 100% depth

Harmonic sway

HARMONIC | split 620 Hz

Helicopter pan

PAN | 180° width
Walkthrough | YouTube
The screen

you can see it happening

Most tremolos draw you an idealised wave. Tremmy draws the modulation it is actually applying - smoothing, swing and shape included - over the audio that actually went through.

Dry behind, processed in front

The signal arriving is drawn dim underneath. The signal leaving is drawn lit on top. The curve over both is the modulation, run through the same slew the engine uses, so at high SMOOTH the corners round off on screen exactly as they do in your ears.

Two bars, alwaysPlayhead follows the hostLow and high traces
Tremmy's modulation display showing the dry waveform behind the processed waveform, with the modulation curve over both
Backlit glass, machined bezel - the traces sit inside something
TREM

Amplitude, with a stereo phase offset. The tremolo everyone means when they say tremolo, locked to your session tempo.

HARMONIC

Splits the signal and modulates the two bands against each other. The level holds still and the tone sways instead.

PAN

Constant-power positioning, where WIDTH decides whether the channels sweep together or in opposition.

Controls

four knobs, then five trims

RATE snaps through note divisions when you are locked to the host and sweeps in hertz when you are not. SHAPE morphs sine through triangle to square. DEPTH and MIX do what they say.

Underneath, five cast-stone trims: SMOOTH rounds the modulation so a square never clicks, GROOVE swings every second cycle, FEEL moves the trough so the dip can snap and recover slowly, or swell and drop sharply.

1/1 → 1/16 and tripletsTabular figuresShift to fine | double-click to reset
The main knob bank: rate, depth, shape and mix
Machined caps, 270° of travel, 180 px of drag
The trim row: smooth, groove, feel, width and tone
Smooth | Groove | Feel | Width | Tone - every one of them redraws the curve
Glide

it slides up into the note

Switch on GLIDE and every dip becomes a run-up: the pitch starts a whole tone below and sweeps into place as the level climbs back. The time knob is a share of the cycle, so it stays in proportion whatever the tempo or the rate.

It works by sweeping a delay line - the same thing tape does when it changes speed - and it resets during the dip, where the signal is quietest. The tremolo pays for the trick.

Two semitonesFollows rate and tempoChords glide together
The transport strip: sync lamp, tempo readout, tap tempo, glide, and the three mode buttons
GLIDE and its TIME knob sit beside the lamp | tap a rate in by hand
The whole panel

nothing hidden behind a menu

Eleven factory presets, a step sequencer, a drawn curve editor, MIDI learn on every control, A/B compare, and a strip mode when you want it out of the way.

The complete Tremmy interface at 960 by 408 pixels
960 × 408 | resizable to 200% | VST3, AU and Standalone
The preset browser: a category rail with photography and a two-column grid of presets
Eleven factory presets, your own bank, and a socket on every card
The advanced screen: a sixteen step sequencer, a drawn curve editor and the routing faders
Draw a sixteen-step pattern or a curve, and choose where the LFO reaches
Price
free.

No account, no licence key, no trial that expires. Just Tremmy with joy!

01

Download the macOS package

Universal - Apple Silicon and Intel in one file. About 13 MB.

02

Drop the plug-ins in place

Tremmy.vst3/Library/Audio/Plug-Ins/VST3/
Tremmy.component/Library/Audio/Plug-Ins/Components/

03

Restart your DAW

Logic and GarageBand cache their plug-in list - rescan if Tremmy does not appear. The Standalone needs no installation at all.

04

Put it after an instrument

Tremmy is an audio effect. On a MIDI track that means dropping it after the instrument, so it works on the sound the instrument makes.