Frekvens is a frequency shifter and delay effect. Unlike a pitch shifter all frequencies are shifted linearly and then fed back into itself using the stereo delay unit. The frequency shifting is achieved with single sideband modulation using a hilbert transform and an infinite impulse response filter for fast computations. Frekvens also comes with a high and low pass filter and a lfo for modulating the delay play head.

- frequency shifter
- high, low pass filter
- stereo delay
- core midi cc input
- audiobus
- inter app audio
- audio unit extension
- save, load

What's New

Version 1.3.10

+++ Fixing AUv3 state saving issue.

Ratings and Reviews

4.2 out of 5
5 Ratings
5 Ratings

I have the bundle!

The controls are somewhat cryptic but once you know what they do (as the on-screen hints indicate) you will find these are very cool apps.

Automaton Adam

Cool app, ui has issues on iPhone

UI elements near corners seldom register taps and overlays can sometimes freeze up on iOS 11.


Stellar App / Stellar Results

How much fun can one have bending and blurring audio? Get frekvens and find out. This app is so smart and ready to play you'll feel like you've got a bouncy puppy which can make your audio roar (or purr or growl or hover like a ghost etc etc). The UI is minimal graphic genius and the magic going on under the hood can turn nearly Any sound source into potential gold. A delicate balance of control and chaos that somehow gets it just right: get it now and don't look back.


erik sigth
5.1 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Erik Sigth


  • Family Sharing

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

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