Tremolo Viola
The Movement Maker
A tremolo built for the lineage.
Nineteen waveforms. Continuous waveshaping. BPM sync.
The same effect that made some classic tracks really move. Now with more control than the original hardware ever had, more shapes than any tremolo plugin we know of, and zero cost to find out what it does to your tracks.
More than an LFO.
A modulation environment.
Nineteen waveforms, not five.
Sine, triangle, square, sawtooth up and down. The classics any tremolo plugin offers. Tremolo Viola goes further with vintage amp models that mimic Fender, Wurlitzer, Vox, and Magnatone circuits. Dynamic shapes like Pulse Decay and Bouncing Ball react to transients. Character options including Optical Style, Twin Peaks, and Smooth Random. Specials covering Guitar Pick, Vintage Chorus, and Slow Gear. Each shape is a different rhythmic personality, all reachable from one selector.
Waveshaping that morphs between shapes.
The Shape control adds a second modulation layer on top of the base waveform. Run a sine through a square shaper for a soft pulse with hard edges. Try a triangle through a Sample & Hold for stuttering rhythms with held notes. The interaction between two shapes opens up textures no single LFO can produce. Standard tremolos cannot do this.
BPM sync or free running.
Lock the rate to your DAW tempo with musical subdivisions for tight rhythmic chops, gating, and stutters that stay in time with the track. Or unlock it and dial in a free rate in Hz for the loose, drifting modulation old amps actually had. Wave Offset shifts the modulation phase along the x-axis to find unexpected rhythmic patterns inside the same waveform.
A real-time visualiser that follows along.
The display shows the active waveform and Shape combination in real time, including the BPM-synced rate or free Hz frequency. Switch between waveforms and you see exactly what the modulation is doing to your signal before you hear it. What you see lines up with what you hear.
Nineteen shapes, zero boredom.
Waveform libraryThe five
- Sine
- Square
- Triangle
- Sawtooth Up
- Sawtooth Down
The amps
- Soft Square
- Fender Style
- Wurlitzer Style
- Vox Style
- Magnatone Style
The reactive
- Pulse Decay
- Bouncing Ball
- Multi-Sine
The unusual
- Optical Style
- Twin Peaks
- Smooth Random
The wild
- Guitar Pick
- Vintage Chorus
- Slow Gear
All nineteen waveforms support continuous waveshaping between adjacent shapes.
Hear what movement sounds like.
Toggle between dry and wet on real material like electric piano, organ, guitar and synth, to hear what the tremolo actually does.
An effect that's been moving us since 1959.
Ray Charles cut What'd I Say with a Wurlitzer 200 in front of him, and tremolo's place in popular music was settled in a single afternoon. The pulse became the underbed of soul and R&B for the next decade. Marvin Gaye's I Heard It Through the Grapevine runs on it. So does most of the Wurlitzer canon.
By the early seventies the Rhodes had taken over and the tremolo went with it. Riders on the Storm is the obvious example. That hypnotic, rain-soaked atmosphere is one Rhodes, one tremolo, and a lot of confidence about how slow you can let a track move. No Quarter by Led Zeppelin pulls the same trick at half the tempo. Money by Pink Floyd uses it as a panning tremolo, riding the stereo field. The effect was suddenly everywhere, holding entire arrangements together.
It never went away. Planet Telex opens with a tremolo'd electric piano. Where It's At by Beck rests on a Wurlitzer pulse. The texture has outlived most production fashions because it does something nothing else does. Volume that breathes in time with the music. Pulse that becomes part of the song's pulse.
Tremolo Viola is built for this lineage. Nineteen waveforms covering the classic shapes plus the dynamic and character variants the original hardware could not produce. Continuous waveshaping between adjacent shapes, so you can land between sine and triangle and find what the song actually wants. Sync it to the grid for rhythmic chops, or run it free for the loose drift the old amps had. Same effect that made some classic tracks really move. More control than they ever had.
Sometimes the thing that moves us in a track is the movement itself.
Built for the DAWs you
actually work in.
Specifications.
Native Apple Silicon. 64-bit Windows. Engineered to load fast and run light, so you can drop it on every channel without thinking about CPU.
- FormatsVST3, Audio Units, and AAX
- Operating systemsmacOS 13 or later · Windows 10 or later
- Architecture64-bit · Intel and Apple Silicon native
- Hardware4 GB RAM minimum · 8 GB recommended · 50 MB disk
- DAW compatibilityLogic Pro · Ableton Live · FL Studio · Cubase · Pro Tools · Reaper · any host that supports VST3, Audio Units, or AAX
- LicensingCompletely free, no time limits, no feature restrictions, free updates forever. Free Acedia Audio account required to activate. Single user, three machines.
- ActivationOnline and offline activation supported. Internet connection required only at the time of first activation.
Like Tremolo Viola? You should check out Kerosene, our colour machine.
Kerosene is the flagship plugin from the same team. Four saturation modes covering soft clip, hard clip, tube, and tape. A reactive noise engine that breathes with your audio. A compressor that finishes the job. The tool your signal chain has been missing.
About Tremolo Viola
Tremolo Viola is a free tremolo plugin for VST3, Audio Units, and AAX, available for macOS 13 and later, and Windows 10 and later. It features nineteen distinct tremolo waveforms, including the five classic shapes (sine, square, triangle, sawtooth up, and sawtooth down), five vintage amp emulations (Fender, Wurlitzer, Vox, and Magnatone styles), and a further nine dynamic and character waveforms covering Pulse Decay, Bouncing Ball, Multi-Sine, Optical Style, Twin Peaks, Smooth Random, Guitar Pick, Vintage Chorus, and Slow Gear.
Each waveform supports advanced waveshaping that morphs continuously between adjacent shapes, opening textures that single-LFO tremolo plugins cannot reach. Run it BPM-synced to your session tempo for tight rhythmic gating, or free-running in Hz for the organic drift of original analog tremolo circuits. Whether you need a subtle pulse on a Rhodes part, dramatic rhythmic gating on a synth, or experimental modulation on a vocal, Tremolo Viola is built to deliver.
Tremolo Viola is completely free with no feature limitations and no time restrictions. Updates are free forever. A free Acedia Audio account is required to activate. The plugin runs natively on Apple Silicon, supports 64-bit Intel and Windows hosts, and works with Logic Pro, Ableton Live, FL Studio, Cubase, Pro Tools, Reaper, and any DAW that supports VST3, Audio Units, or AAX. Download Tremolo Viola today from Acedia Audio.
Free download.
The tremolo that's
still moving us.
Nineteen waveforms. Advanced waveshaping. BPM sync or free running. No card required, no time-limited features, no upsell after the install. Just the plugin and what it does to your tracks.