IEM Plug-in Suite
The IEM Plug-in Suite is an open-source collection of Ambisonic audio plugins, including tools that support up to seventh-order processing.
About IEM Plug-in Suite
The IEM Plug-in Suite is a collection of audio plug-ins for Ambisonic spatial sound, developed by staff and students of the Institute of Electronic Music and Acoustics. The plug-ins cover encoding mono and stereo signals into Ambisonic format up to 7th order, designing decoders for custom loudspeaker layouts, simulating rooms, granular synthesis, multi-band compression, delay, and visualizing the energy distribution of an Ambisonic signal.
The homepage describes the suite as free to use and open source, licensed under GPLv3. It lists compiled builds for macOS, Windows and Linux. The homepage warns that versions v1.16.0, v1.15.0 and v1.3.0 introduced breaking changes, so projects made with earlier versions may not behave as expected.
Key features
- Encodes mono or stereo audio into Ambisonic format up to 7th order
- Designs Ambisonic decoders for any desired loudspeaker layout using AllRAD
- Simulates a shoebox-shaped room with over 200 wall reflections
- Granular synthesis of mono or stereo audio into Ambisonic sound scenes
- Splits Ambisonic signals into four bands for individual compression
- Visualizes energy distribution on the sphere of an Ambisonic signal
Best for: Composers, musicians and audio engineers who work with Ambisonic spatial audio inside a digital audio workstation.
Good for
- The homepage describes the plug-ins as free to use and open source under GPLv3
- Compiled plug-ins are available for macOS, Windows and Linux
- The plug-ins result from the institute's ongoing research and student projects
Watch out for
- Breaking changes in v1.16.0, v1.15.0 and v1.3.0 may stop older projects working as expected
- The RoomEncoder is described as the most complex and computation-intensive plug-in in the suite
IEM Plug-in Suite at a glance
- Website
- plugins.iem.at
- Category
- Music & Audio › Audio Editing & Production
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Audio Editing & Production
IEM Plug-in Suite alternatives
Tools and sites you could use instead, ranked by how closely they match.
Browse audio plugins, including effects for shaping and processing sound, in the Airwindows collection.
SPARTA offers open-source plugins for spatial audio production and playback, including high-resolution Ambisonic tools.
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IEM Plug-in Suite FAQ
Which operating systems are supported?
Compiled plug-ins are available for macOS, Windows and Linux.
Do newer versions work with older projects?
The homepage warns that versions v1.16.0, v1.15.0 and v1.3.0 introduced breaking changes, and projects made with previous versions might not work as expected. It points to the Breaking changes article and the ChangeLog for details.
Is the suite free to use?
The homepage describes the suite as free to use. Pricing is not otherwise stated.
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