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

4.5 out of 5
8 Ratings
8 Ratings
Mo Freeapps ,

Party over here...

Ahh..freqvens - probably my favorite iOS effector. This thing can do so much to your sound or you can real it back and it will give your audio a nice little sizzle or warble that, every one’s saying just pleases the ear. I’m not going to tell you no collusion because if you offer some extreme parameters to this device STAND BACK or moreover SIT DOWN because if you close your eyes it sounds like an imperial probe is sexting with the black knight and WHAT THE HELL WOULD THEY BE SAYING TO EACH OTHER ?? Buy this app and find out.

anickt ,

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.


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.

More By This Developer

You May Also Like