midiFILTr-PG is a Probability Gate MIDI effect designed for Audiobus 3 but also usable with CoreMIDI. midiFILTr-PG listens to MIDI input and based on random chance mutes some of the incoming notes to make a busy, repetitive stream of notes a little more interesting and sparser. It has four modes:
Gate Mode - One set percentage to be muted for all notes. Also includes Gate On Repeats (when a note passes through unmuted, also pass through X more notes after) and Gate Off Repeats (when a note does not pass through the gate, also mute the next X notes) to make things a little more interesting.
Note Mode - Each note in the scale (C, C#, D etc) has its own percentage chance to mute incoming notes.
Sequencer Mode - Every eight notes has a different percentage chance to be muted. Can also change the sequence length to be less than eight.
Thru Mode - Nothing is muted, normally not used but there if you need it.
If midiFILTr-PG is inserted as an Audiobus 3 MIDI effect it should be setup and work automatically. If you wish to use it without Audiobus you can toggle the CoreMIDI input and output and use it that way.

What’s New

Version 1.0.1

Bug fixes for iPhone

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

TooMuchTo ,

Like a modular gate in my midi setup

I use this in almost ever one of my tracks. It’s superb for adding probability based triggers to midi. Create fills, “random” ambient notes, call and response. I wish to god it was AU3 and that it covered and expanded series of steps greater than 8 (other settings can get around this) but combine this with midi scales and viola instant fun. I’ll keep it forever!

Leostrong99992222 ,

5 stars!!

This app is now vital and indispensable in my workflow. Highly recommend!

To the developer, any plans for making this an Audio Unit (au v3) for use directly with AUM?


Arthur Kerns
2.6 MB

Requires iOS 10.2 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
©2017 Art Kerns Music + Apps


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like