v 1.5 ©2023 Michael Norris

SoundMagic Spectral is a freeware suite of 23 Audio Unit plug-ins that implement real-time spectral processing of sound. This set of effects give you unprecedented control and creativity in the processing of audio, whether from static audio files or live audio streams.


Complete Effects List

Included in Soundmagic Spectral are the following plug-ins:

Spectral Averaging
Spectral Bin Shift
Spectral Blurring
Spectral DroneMaker
Spectral Emergence
Spectral Filterbank
Spectral Freezing
Spectral Gate and Hold
Spectral Gliding Filters
Spectral Granulation
Spectral Harmonizer
Spectral Partial Glide
Spectral Pitch Shift
Spectral Pulsing
Spectral Shimmer
Spectral Shuffle
Spectral Stretch
Spectral Tracing
Spectral Weave
Grain Streamer
Idee Fixer
Super Filterbank



Click here to download SoundMagic Spectral v1.5 (compatible with Mac OS X 10.10 or later)


I am currently porting SoundMagic Spectral to the JUCE framework, which will allow for SoundMagic to run as a VST, AAX and for both Macs and PCs as well. I have already got Spectral Blurring working, so now I just need time to do the other 22 plugs! Your donation to ongoing development will make this faster, and encourage further development. Click the button to donate via PayPal — thanks!



Audio examples


Badinerie from Bach’s Suite in B Minor Women’s Song from the Solomon Islands



Badinerie with Spectral Bin Shift Badinerie with Spectral Blurring Badinerie with Spectral Dronemaker Badinerie with Spectral Emergence Badinerie with Spectral Filterbank Badinerie with Spectral Freezing Badinerie with Spectral Gate & Hold Badinerie with Spectral Gliding Filter Badinerie with Spectral Granulation Badinerie with Grain Streamer Badinerie with Spectral Harmonizer Badinerie with Spectral Partial Glide Badinerie with Spectral Shimmer Badinerie with Spectral Shuffle Badinerie with Spectral Stretch Badinerie with Spectral Tracing Badinerie with Spectral Weave Women's Song with Spectral Bin Shift Women's Song with Spectral Blurring Women's Song with Spectral DroneMaker Women's Song with Spectral Emergence Women's Song with Spectral Filterbank Women's Song with Spectral Freezing Women's Song with Spectral Gate & Hold Women's Song with Spectral Gliding Filters Women's Song with Grain Streamer Women's Song with Spectral Granulation Women's Song with Spectral Harmonizer Women's Song with Spectral Partial Glide Women's Song with Spectral Pitch Shift Women's Song with Spectral Pulsing Women's Song with Spectral Shimmer Women's Song with Spectral Stretch Women's Song with Spectral Tracing Women's Song with Spectral Weave



Version History

Version 1.5: recompiled as Universal Binaries

Version 1.4: fixed problems with AUs not validating in Logic Pro; notarized all plug-ins to work in stricter security measures; recompiled with XCode 14

Beta 9: fixed a problem with Spectral Partial Glide occasionally crashing; fixed some problems with the installer; recompiled with XCode 7.3.1

Beta 8: fixed a problem with Spectral Weave not showing in 64-bit mode • code-signed installer to avoid GateKeeper issues

Beta 7: fixed a problem with previous versions not being Universal • changed Mr Filterbank to Super Filterbank, with new options

Beta 6: updated all effects to 64-bit/32-bit • fixed potential crashes in Spectral Filterbank & Granulation • added Spectral Weave effect • added "Gate Type" parameters to Spectral Gate & Hold • added a silence stage to Spectral Gate & Hold • fixed a crash in Spectral Bin Shift • added some new options to Spectral Bin Shift • fixed some incorrect operation in Spectral Freezing

Beta 5: fixed a crash in Spectral Stretching • fixed a crash in Spectral Pulsing • added some nice pulsing effects and delay vs. freq parameter to Spectral Gate & Hold • added some new options to Spectral Tracing for retaining/removing at different ends of the loudness spectrum • added a new "variance quantization" parameter to Spectral Stretching, allowing for interesting pitch variation effects • Idee Fixer now passes auval • made the default "Randomize Phases" settings more appropriate to each effect

Beta 4: Fixed some serious bugs with Spectral Dronemaker and Spectral Emergence. Added bin shift to Spectral Gate & Hold

Beta 3: Some new envelope possibilities in Spectral Gate & Hold, new plug-in "Idee Fixer"

Beta 2: Now validates correctly with auval, which means it can run in Logic; some code optimization across the board

Beta 1 UB: Now compiled as Universal Binaries

Beta 1: First beta release



System Requirements

Mac OS X 10.6 or later


Software Requirements

An Audio Unit host (one of):

  • Ableton Live (4.0 or higher)
  • Amadeus
  • Apple GarageBand
  • Apple Logic Pro (or Emagic Logic 5.5.1 or higher)
  • Apple Logic Express
  • Apple Soundtrack (version 1.10 or later)
  • Apple Soundtrack Pro
  • Arizona AudioXplorer
  • Audiofile Engineering Wave Editor
  • BIAS Peak, Peak LE, and Peak DV 4.0 or higher, and Peak Pro
  • Celemony Melodyne 2.0 or higher
  • DSP-quattro 1.2 or higher
  • Freeverse Sound Studio 3.0 or higher
  • Illposed Ouroboros (free beta)
  • Intuem (2.0.1 or higher)
  • Max/MSP (using au~ external available from my website)
  • Metro (6.0 or higher)
  • MOTU Digital Performer (version 4.1 or higher; best with 4.52 or higher)
  • Numerology (version 1.2 or higher?)
  • Plogue Bidule
  • Rax (free beta)
  • Rogue Amoeba Audio Hijack Pro
  • Freeverse SoundStudio3
  • SynthTest
  • TC|Works Spark XL and Spark LE (2.8 or higher)
  • WaveBurner



Video Gallery