DeepGliss
Key Features
- Continuous pitch bending between chords with independent voice movement for each note in the progression
- MIDI Polyphonic Expression (MPE) output enables per-note pitch control through any MPE-compatible synth or sampler
- Visual GUI displays each note's glide path between chord positions in real time
- Configurable pitch bend range to match your target instrument's settings
- Cross-platform support with native builds for macOS, Windows, and Linux
- Open-source codebase written in Rust, allowing community contributions and custom builds
- Compatible with popular MPE synths including Vital, Ableton Operator, and Spitfire String Quartet
Description
DeepGliss is an open-source VST plugin that performs continuous pitch bending between chords using MIDI Polyphonic Expression (MPE) technology. Rather than shifting entire chords in rigid blocks, each individual note glides independently to its next target, creating fluid internal voice movement that sounds far more organic and musical.
The plugin was inspired by the iconic THX Deep Note sound combined with the concept of glissando. It works by routing MIDI through DeepGliss into any MPE-compatible synthesizer or sampler, such as Vital, Ableton Operator, or Spitfire String Quartet.
What makes DeepGliss especially compelling is how it reimagines synth parts in an orchestral sense. Much like divisi violins in a string section, each voice transitions through its own unique path between chords, producing shifting harmonies and rich movement that static chord changes simply cannot achieve.
The effect can range from dramatic and tense, ideal for film scoring moments, to subtle and musical for adding expressive depth to chord progressions. The GUI provides a clear visual representation of each note drifting between positions, making it easy to understand and control the bending behavior in real time.
DeepGliss is available in VST2 format for macOS, Windows, and Linux, with setup tutorial videos for both Ableton Live and Bitwig Studio available on the developer's website.
Frequently Asked Questions
Does DeepGliss require an MPE-compatible synth to work?
Yes, DeepGliss outputs MIDI Polyphonic Expression data, so it needs to be routed into a synth or sampler that supports MPE. Compatible instruments include Vital (which is also free), Ableton Operator, and Spitfire String Quartet, among others.
How do I set up DeepGliss in my DAW?
Place the DeepGliss plugin file in your VST2 directory, then create a MIDI routing chain in your DAW where MIDI input goes into DeepGliss and its MIDI output feeds into your MPE instrument. You also need to match the pitch bend range setting in DeepGliss with your target synth. Setup tutorials for Ableton Live and Bitwig Studio are available on the developer's website.
Can DeepGliss produce subtle pitch bends or only dramatic glissando effects?
DeepGliss handles both extremes well. You can create dramatic sweeps similar to the THX Deep Note effect, or use smaller chord intervals for subtle, musical voice-leading transitions. The visual GUI helps you see exactly how each note moves between positions.
Is DeepGliss still in active development?
DeepGliss is currently in alpha (version 0.1.7) and is open source on GitHub. The developer accepts bug reports, feature requests, and contributions through GitHub issues or email. Several updates have been released since the initial launch, including macOS compatibility fixes.
