Your solution for dialogue fills,
matching room tone and creating soundscapes
Undertone 2 takes the fuss out of creating effective dialogue fills. Import your audio – ambience or a whole take of original dialogue – and the plugin will resynthesise it into a consistent bed of ambient sound. You can also take things further, generating complex soundscapes using multiple samples and probability weightings.
Fills Made Simple
Import original dialogue audio or recordings of just the ambient background (AudioSuite supported), and Undertone 2 will automatically slice and recombine it to output a bed of sound.
As Deep as You Need
Simulate entire scenes with sample triggering probabilities, edit imported samples, make multichannel granular movement, pitch and filtering, up to 50 grains, random and reverse.
Support
VST3 / AU / AAX / AudioSuite
Up to 7.1 Panner support
Multichannel path movement
Full automation support
License by iLok (USB)
Three Ways, One Tool
Every sound is different. Undertone 2 has three ways to resynthesize anything from a whirring machine, a real-world ambience or a complex soundscape. Use one or combine them to get the sound you need.
1
Granular Engine
Resynthesises audio by playing back multiple grains of up to 30 seconds each. Randomize grains’ Level, Pitch and Reversal. Apply filtering and try Multiband mode. Ideal for ambience that contains ‘events’ like keyboard clicks or chattering.
2
Convolution
Use the sample as an impulse response. Change the pitch, length, filtering and noise profile. Great for keeping the complexity and character of constant tones like whirring machines and ambient room sounds.
3
Multi Sample
Load up to 10 samples and set their probabilities to trigger. Build everlasting soundscapes from individual samples, conjure dronescapes, and engage the Panner to playback up to 50 grains with individual movement paths
Testimonials
“Undertone is my favourite tool for creating dialogue fills. It sounds more natural than anything else I’ve tried.”
“Undertone has become an invaluable tool in my effects editorial and design arsenal. In many instances, I am able to take a handful of seemingly ordinary sounds and create unique beds with extraordinary movement, characteristics, and, at times, emotion.”
“Undertone is now an essential in my dialogue-editing toolbox – for creating a clean fill, a fill with movement in it, for continuing big noises such as planes or car noise which is often hard to fill, for elongating screams…you name it. And it’s a must-have for creating DX sessions for M&E too. Strongly recommended!”
“The grown up kids at Audiokids have enclosed two of my desert island DSP tools – granulation and convolution – in a unique and friendly device. Once you’ve started using Undertone, it’s addictive… primarily for the tiny but important tasks such as creating air fills for dialogue tracks. Watch out though: it’s a powerful instrument to create complex soundscapes and atmospheres in an intuitive, simple interface. Kudos to Davide, Fabrizio and Mattia!”
Fulfilled with just fills? Try Undertone Lite
For simple ADR jobs and dialogue fills, Undertone Lite brings you Undertone’s granular and convolution engines for single-sample background ambience recreation. Undertone Lite costs a little less and can always be upgraded to the full Undertone when you need more power. Compare Undertone 2 and Undertone Lite with the Comparison Table at the bottom of this page.
Undertone Lite owners wishing to upgrade to Undertone 2 can do so at the shop using this link.
Single Engine
Granular, represented in blue, automatically slices grains of up to 30 seconds from the selected sample, and plays many at once to overlap, similar to traditional slice-and-dice techniques for creating dialogue fills from existing room tone. You can choose the amount of Random Level (variation) between grains, Random Pitch (variation) between grains, what proportion of grains play in Reverse,
The Convolution engine, represented in white, convolves the loaded sample to resynthesis it. You get control over the IR Length and IR Pitch of the impulse response, and can apply a noise profile as a pseudo low-pass effect.
Multi Engine
This engine can wield up to ten loaded samples, and can be blended with the Single Engine using another mix control. The engine spawns up to ten grains at once, or up to 50 if using the Panner (see below). Each sample loaded into the Multi Engine can be changed for its Level, Random Level, Pitch, Random Pitch, Reverse, Grain Size and Envelope.
Each sample can also be set in its Probability and Grains Limit. These values together determine the likelihood of a certain grain spawning next. These controls are powerful when constructing a more complex scene in which different samples (drills, hammers, birdsong, car horns?) are triggered more or less frequently and at different pitches.
Blend it all
You can use the power of all three of Undertone’s engines at once, should you wish. By blending between the Granular and Convolution engines first, and then mixing the result of this with the Multi engine, you can strike a balance between a simple ambience fill and an entire generative scene.
Sample Editor
Trim down a sample to focus on the bits that really matter. Undertone’s sample editor means you can drag in any audio file – including one with speech – and isolate the background noise and ambience from within the plugin. Thanks to AI voice recognition, selecting only parts of your file is simple and usually quite instant.
Select a region to trim to, and the sample will act as if this is the only audio data loaded into the slot. The spectrogram view lets you pinpoint and avoid unwanted background sounds. It’s a great way to make absolutely sure that the source sound for your fill is working the best it can.
Panner
Get up to 50 grains moving from place to place in multichannel setups. Choose a starting point and ending point for your path, and grains will then be created at the start and end playback at the end point. The Panner is great for creating moving ambience and ‘directional atmosphere’ such as wind that actually moves the way it’s portrayed.
100+ Presets
From air conditioners to drone armies, we’ve included it all in Undertone’s built-in sounds. Choose starting points or load readymade fills. Undertone 2’s preset browser is hugely powerful, with tagged presets helping to narrow down your selection, and user tags helping you to keep even more organised.
Undertone: an Overview
| Undertone 2 | Undertone Lite | |
|---|---|---|
| General | ||
| 100+ included presets and starting points | Y | Y |
| 100+ more included presets and drones | Y | |
| Sample Editor for trimming and using ideal regions | Y | Y |
| AI autoselection for regions of speechless audio (macOS only) | Y | |
| From single sounds to a multitude | Y | Y |
| Resizeable user interface | Y | Y |
| Drag and drop support for audio files and presets | Y | Y |
| Dry mix level and overall Output level controls | Y | Y |
| History (in AudioSuite version) | Y | |
| Synthesis capabilities | ||
| Single-sample convolution and granular engines | Y | Y |
| Multi-sample granular engine with up to 10 samples | Y | |
| Random Pitch, Random Level, Sample Reverse (Granular) | Y | Y |
| Impulse Response Length and Pitch controls | Y | Y |
| Filter for Impulse Response and Granular grains. Can be linked | Y | Y |
| Affect impulse response with noise profile | Y | Y |
| Turn mono recordings into surround ambiences | Y | |
| Randomise sounds in time and space | Y | |
| Control the proportion and chance of different grains playing | Y | |
| Animate grains to move location (from stereo to 7.1) | Y | |
| Multiband: grains split into four bands with unique start/end positions | Y | |
| Support | ||
| Up to 7.1 surround sound (with Panner active) | Y | |
| Available in VST3, Audio Units, AAX Native and AudioSuite formats | Y | Y |
| Automation support for all parameters | Y | Y |
| Import audio and render with AudioSuite only | Y | Y |
| Accessibility-enabled UI (supported hosts) | Y | Y |
| Native Intel and AppleSilicon support on MacOS 10.12 to 12.4 | Y | Y |
| Windows 8 to 11 support | Y | Y |