# midiLFOs - midi modulator — AUv3 MIDI Effect > MIDI controller app and AUv3 MIDI effect for music app modulation. (iPhone/iPad app by Arthur Kerns.) - Source: https://appshunter.io/ios/app/midilfos-midi-modulator/id998273841 (this page in markdown: same URL + `.md`) - Developer: [Arthur Kerns](https://appshunter.io/developer/998273840) - Category: Music - Price: $4.99 - Rating: 4.90/5 from 21 App Store ratings · 14 written reviews indexed - Age rating: 4+ - Requires: iOS 11.4 · 3 MB - Languages: American English - Released: 2015-07-10 - Data updated: 2026-08-24 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/midilfos-midi-modulator/id998273841/reviews.md ## What is midiLFOs? midiLFOs is a MIDI controller app and AUv3 MIDI effect that sends MIDI modulation control data to other music apps and external synthesizers. It has four independent LFOs that send 7 bit MIDI CC messages in repeating Low Frequency Oscillating patterns. The LFOs can be the various standard shapes (sine, saw, triangle, square, sample and hold) but can also modulate each others amplitude and rate to create even more interesting shapes. midiLFOs does not make music or sound by itself, it controls other MIDI capable synth apps and devices in your studio. You can use it to modulate the filter cutoff frequency of your favorite synth app, the pan position of the hi hats in a drum machine app, the feedback amount of a delay effect, or the pitch of an external hardware synthesizer. Or you can do all four at the same time. midiLFOs features: - Four independent LFOs that send 7-bit MIDI CCs - Easily configure CoreMIDI port, channel, CC# per LFO - Use in other apps as a MIDI Audio Unit Effect - Easily adjust shape, rate, offset, lag per LFO - Modulate the rate and amount of an LFO using other LFOs - Sync LFOs to MIDI clock or Ableton Link - Map trigger, LFO rate, and modulation amount values to incoming MIDI Designed to be easy to configure and use, midiLFOs gives you a quick to configure and easy to use MIDI LFO controller toy with extra features that also make it a useful pro music studio tool. AUv3 support requires an AU host app that supports MIDI effects, such as AudioBus 3, AUM, etc. ## Key features - Four independent LFOs - 7-bit MIDI CC message generation - Multiple standard LFO shapes - LFO rate and amplitude modulation - AUv3 MIDI effect support - MIDI clock and Ableton Link sync - MIDI input mapping ## Chart rankings - #174 in Top Paid · Music (US App Store) ## Recent user reviews (10 of 14) All indexed reviews: https://appshunter.io/ios/app/midilfos-midi-modulator/id998273841/reviews.md ### 2/5 — Great app *2024-07-29* Does what it says ### 2/5 — Bug Found in exposed AUv3 parameters *2024-07-27* The exposed parameters (eg. in AUM) respond to midi mapping externally but the changes don’t propagate into the plugin. ### 5/5 — Great app *2024-07-15* Lightweight. Very useful. UI is a little clunky but then I’m not gonna write a replacement myself. ### 1/5 — Don’t fooled by the GUI *2024-05-29* It doesn’t actually show you the LFO signal. It’s just an image. Kinda makes using this with cross LFO modulation useless. You’re better off with some like lfoh! Would have liked to return but the useless UI wasn’t a sufficient return reason. One star. ### 5/5 — Perfect *2021-03-13* Wish I could attach this directly to several hardware boxes. It’s perfect/brilliant. Wish every LFO I used was replaced by this app. Easy, quick with just enough depth/futzability. ### 5/5 — Brilliant *2020-10-29, version 3.1.1* One of my most used AUs. Easy to use, flexible, reliable, and undeniably useful. ### 5/5 — Great app, needs MIDI Learn *2020-07-08* Like it but would love MIDI learn to auto assign incoming cc/nprn to the selected LFO. That would be hugely helpful to avoid having to dig thru manuals to find model specific CC#s. ### 5/5 — Beats Bram Bos Rozeta LFO *2019-12-06* MidiLFOs provides superior visual feedback compared to the Rozeta LFO. Another good sign is A.K. also took the trouble to supply a pdf help manual that moves beyond the level of 'This a knob. It is my knob. I turn the knob left and I turn the knob right. The knob goes from 0 to 10...'. I appreciate this since I do not have a history of using midi hardware and so I'm thankful for pertinent discussion/instruction/how-to on the subject of Midi as it relates to this software synth realm I have recently found myself enjoying. ### 5/5 — MASSIVE! *2019-09-27* Amazing for procedural music, as I like to call it since I come from video games lol. This thing is perfect for modular synthesis, in more traditional musical terminology. If you know what you’re doing, you won’t regret buying this. And realistically, if you were looking for a MIDI LFO controller, yes you probably already know what you’re doing so just get it right now. My main suggestions about what to combine with this app: Step Poly ARP: turn the MIDI CC into notes somehow: I use the app Mozaic with a custom script I wrote, then quantize that to a scale and run it through an Arpeggiator. ApeMatrix: Super simple to send midi in interesting and dynamic ways, AUM and AudioBus lock you into a very linear workflow especially when setting MIDI up which can lead to slow innovation and creativity. ### 5/5 — Great AUv3 Update *2019-09-13* A nice update which allows you to run multiple instances for even more MIDI modulation LFO control of your setups. ## Frequently asked questions about midiLFOs ### What is midiLFOs used for? midiLFOs is a MIDI controller app and AUv3 MIDI effect designed to send MIDI modulation control data to other music apps and external synthesizers. It generates repeating Low Frequency Oscillating patterns to control parameters like filter cutoff or pan position. ### Does midiLFOs make sound on its own? No, midiLFOs does not produce any sound or music by itself. Its sole function is to control and modulate parameters within other MIDI-capable music applications and hardware synthesizers. ### What kind of LFO shapes does midiLFOs offer? midiLFOs offers standard LFO shapes including sine, saw, triangle, and square. It also includes a sample and hold shape, and allows LFOs to modulate each other's amplitude and rate for more complex waveform generation. ### How can I use midiLFOs with other apps? midiLFOs can be used as an AUv3 MIDI effect within compatible AU host apps like AudioBus 3 or AUM. It allows you to easily configure CoreMIDI ports, channels, and CC numbers for each LFO to control parameters in other music apps. ### Can midiLFOs sync with external tempo sources? Yes, midiLFOs can sync its LFOs to MIDI clock or Ableton Link. This ensures that the modulation patterns stay in time with your other music production tools and applications. ### What is the price of midiLFOs? midiLFOs is a paid application, priced at $4.99. This is a one-time purchase and does not involve any subscriptions or in-app purchases. ### How often is midiLFOs updated? The latest version of midiLFOs, 3.1.1, was released on April 22, 2020. While updates have not been very frequent recently, the app has been stable and functional for users since its initial release in 2015. ### Does midiLFOs have ads? No, midiLFOs does not contain any advertisements. As a paid application, it provides an ad-free experience for users. ## Version history (last 5 releases) ### 3.1.1 — 2020-04-22 Fixed AU startup crash with some devices / iOS version combinations. Added visual display of current mod values from other LFOs on the mod sliders. Expanded the range of the clock synced rate AU parameter to match 3.1.0 increase. ### 3.1.0 — 2020-03-16 Added velocity mod source to the AU Added "CONS" constant mod source to the AU, which allows you to control the depth of the LFO modulation with the amp slider or mod amount AU parameter Added a bit more range on the slow end to synced LFOs in the AU Added a reset to the LFO in the AU when its synced to the timeline and you restart the timeline Added "modulator" to AU name Added AU user shared presets Fixed crash in standalone app settings due to Bluetooth permissions Misc fixes and improvements ### 3.0.0 — 2019-09-13 Added AUv3 MIDI Effect support Updated to latest Audiobus Other misc fixes and updates ### 2.0.2 — 2017-05-04 Bug fixes And everything from 2.0.0: Ableton Link support AudioBus 3 support AB state saving Bluetooth MIDI configuration Remove slide animation Bug fixes and minor improvements ### 2.0.1 — 2017-04-07 Fixed conflict with external audio interfaces / iPhones and AB3 And everything from 2.0.0: Ableton Link support AudioBus 3 support AB state saving Bluetooth MIDI configuration Remove slide animation Bug fixes and minor improvements ## Apps similar to midiLFOs | App | Rating | Price | Category | | --- | --- | --- | --- | | [VAPolyMkII](https://appshunter.io/ios/app/vapolymkii/id6476809566) | 4.6 (11) | $14.99 | Music | | [Note to Be - MIDI Quantizer](https://appshunter.io/ios/app/note-to-be-midi-quantizer/id6596771972) | 4.9 (7) | $4.99 | Music | | [In Theory - Interval Keyboard](https://appshunter.io/ios/app/in-theory-interval-keyboard/id1667984658) | 5.0 (4) | $4.99 | Music | | [Xequence AU \| Keys](https://appshunter.io/ios/app/xequence-au-keys/id1453028249) | 4.9 (18) | $2.99 | Music | | [MuseBud - AUv3 MIDI Generator](https://appshunter.io/ios/app/musebud-auv3-midi-generator/id6472487197) | 4.9 (11) | $5.99 | Music | | [mLFO](https://appshunter.io/ios/app/mlfo/id1602306976) | 4.5 (20) | $5.99 | Music | ## More apps by Arthur Kerns - [midiSTEPs](https://appshunter.io/ios/app/midisteps/id1001532047) - [midiFILTr-VS for Volca Sample](https://appshunter.io/ios/app/midifiltr-vs-for-volca-sample/id1220579047) - [midiGATEs - midi probability](https://appshunter.io/ios/app/midigates-midi-probability/id1226296557) - [midiDREAMs](https://appshunter.io/ios/app/mididreams/id1553799788) All apps by Arthur Kerns: https://appshunter.io/developer/998273840 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*