Free Eurorack modules for iOS: Spectrum AU bundle based on Mutable Instruments code

(Image credit: Burns Audio)

Burns Audio has had the bright idea of taking the code from four MIT-licensed open source Eurorack modules that were created by Mutable Instruments and turning them into free iOS Audio Units plugins.

Known collectively as Spectrum and available in a bundle, the modules in question are:

Spectrum: Multimode eight-voice polyphonic oscillator featuring 14 algorithms
Modal: Modal synthesis. Bowed, blowed and struck sounds through a 64-band resonator. Also included as an effect.
Resonator: Seven string generation algorithms. Also included as an effect.
Granular: Granular sampler, looper, pitch shifter, reverb effect.

Each plugin also features an LFO, ADSR envelope, XY touchpad (except Modal) and 2-source modulation matrix. MIDI CC control of all parameters is offered, too.

You can download the Spectrum Synthesizer Bundle for free from the Apple App Store.

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I’m the Deputy Editor of MusicRadar, having worked on the site since its launch in 2007. I previously spent eight years working on our sister magazine, Computer Music. I’ve been playing the piano, gigging in bands and failing to finish tracks at home for more than 30 years, 24 of which I’ve also spent writing about music and the ever-changing technology used to make it.