Blue Cat’s FreqAnalyst
Blue Cat Audio
FreqAnalyst displays the frequency content of an incoming audio signal.
View details →THE AUDIO MAGAZINE / RESOURCES
Audio Units (AU) – Free Music Software & Plug-ins
Find permanently free recording tools, instruments, effects and audio utilities for desktop, mobile and the browser. Each listing explains its purpose, compatibility and important free-edition restrictions, with links to the official source.
These are researched directory entries, not hands-on reviews. Optional purchases, account requirements and limited editions are identified on product pages. Format availability can differ by operating system.
201 listings
Blue Cat’s Gain Suite
Blue Cat Audio
Gain Suite supplies gain-control utilities for individual tracks and linked groups.
View details →Blue Cat’s Phaser
Blue Cat Audio
Blue Cat's Phaser adds phase-shift modulation for the familiar moving notches heard on guitars, keyboards and effects.
View details →Blue Cat’s Triple EQ
Blue Cat Audio
Triple EQ is a compact equalizer built around linked filtering controls and a visual response curve.
View details →Box of Bass
Box Of Rules
Box of Bass builds a layered bass chain from sub, clean cabinet, driven microphone and room paths.
View details →bubblegum
Your Smile is Art
bubblegum is a graphical pitch editor for recorded vocals and melodic material.
View details →Bucket Pops
Full Bucket Music
Bucket Pops draws on the rhythm-box sound of the Korg Mini Pops family.
View details →BYOD
ChowDSP
BYOD is a modular guitar-processing environment for connecting different distortion and supporting stages.
View details →Cardinal
DISTRHO
Cardinal packages a virtual modular environment for use in supported plug-in and standalone contexts.
View details →Chameleon
GuitarML
Chameleon is an open-source guitar-modeling processor designed around learned device behavior.
View details →CHANNEV
Analog Obsession
CHANNEV combines channel-strip-style processing in a single plug-in.
View details →Chorus WS-1
Mercuriall Audio
Chorus WS-1 supplies a guitar-oriented chorus effect for adding ensemble movement.
View details →Chow Centaur
ChowDSP
Chow Centaur models a guitar overdrive circuit and offers several approaches to the modeled processing.
View details →Chow Kick
ChowDSP
Chow Kick synthesizes kick-drum sounds through a model-oriented signal path.
View details →Chow Matrix
ChowDSP
Chow Matrix is a delay processor organized around interconnected delay nodes.
View details →Chow Phaser
ChowDSP
Chow Phaser applies phase-based modulation inspired by analog circuitry.
View details →Chow Tape Model
ChowDSP
Chow Tape Model explores the behavior of magnetic tape through a collection of modeled processes.
View details →CollaB3
Sampleson
CollaB3 is a free tonewheel-organ instrument created through a collaborative development effort.
View details →COLONY
13x Audio
COLONY groups drive, movement, space, pumping, width and noise-related color around an ENERGY macro.
View details →ConjureAlign
ConjureDSP
ConjureAlign compares a recording with a sidechain reference to estimate time offset and polarity.
View details →Couture Free
Auburn Sounds
Couture Free shapes transients, helping alter the apparent attack and sustain of recorded material.
View details →DC1A
Klanghelm
DC1A is a streamlined compressor built around input and output controls, with switches that alter its response.
View details →dearVR AMBI MICRO
Sennheiser / Dear Reality
dearVR AMBI MICRO processes and monitors Ambisonic material, including binaural rendering for headphones.
View details →dearVR MICRO
Sennheiser / Dear Reality
dearVR MICRO is a binaural spatializer for placing a source in a headphone-oriented three-dimensional sound field.
View details →Availability, licensing and system requirements can change. Verification refers to official documentation and download availability, not installation or hands-on testing. Check the developer's current terms before installing.