App: apeFilter
Developer: apeSoft
Genres: Music, Education

+ Standalone application
+ AudioUnit V3 ***
+ Ableton Link 
*** AUv3 is supported (yet) in few host as Logic Pro X, Reaper, Garage band, Hosting AU

apeFilter is a sophisticated Equaliser, the DSP is based on the Biquad/Cascade filters, very fast! The graphical interaction provides a great tool to design an extremely precise and smooth frequency response by directly manipulating up to 36 Peaks Filters. The Spectral Grid compilers increase the complexity and coherence between the filters bandwidth space. You can create your pitch space by the way of four different criteria of construction by determining a pitches grid: Fibonacci, Harmonic, Geometric and Scalar. Use apeFilter for sculpt your sound through the embedded sampler or LIve from Audiobus or Inter-Audio-App Input. Among the FX chain,  an amazing ClassicVerb is available.

+ 72 Peak Filters for Spectral Grid Compilers
+ 4 Spectral Grid Compilers: Fibonacci, Harmonic, Geometric and Scalar
+ 6 Common Filters: Lowpass, Hipass, Bandpass, Notch, Lowshelf, Hishelf
+ MIDI Note On/Off messages, for playing Filters Frequency and Filters Peaks Gain
+ Audiobus and Inter-App Audio support (sender and FX)
+ Built In Stereo Sampler with varispeed
+ Control Manager LFO for Parameters
+ Midibus, Virtual Midi and Network: 14 bit NRPN controllers
+ File Manager, sharing common audio files
+ Snapshot Presets Morphing Pad
+ Post Fx Chain: Stereo Delay, Amazing ClassicVerb and Dynamic compressor/expander

Release notes:
+ Ready for iOS 15
+ AUv3: LFO modulation Gain/Fc/Q bug fixed