# Multiband — frequency splitter audio unit

> Audio plugin for splitting sound signals into frequency bands for advanced processing. (iPhone/iPad app by Blue Mangoo Consulting Company Limited.)

- Source: https://appshunter.io/ios/app/multiband/id1522438777 (this page in markdown: same URL + `.md`)
- Developer: [Blue Mangoo Consulting Company Limited](https://appshunter.io/developer/1475107602)
- Category: Music
- Price: Free
- Rating: 4.60/5 from 32 App Store ratings · 11 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 2 MB
- Languages: American English
- Released: 2021-01-20
- Data updated: 2026-08-30
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/multiband/id1522438777/reviews.md

## What is Multiband?

Multiband splits an audio signal into separate channels: one for each of up to four frequency bands. It is useful for doing multiband processing using effects plugins that were not designed for multiband processing. For example, you could do multiband compression using two different compressor plugins, one for bass and a different one for treble frequencies. Or you could process a chorus or flanger effect on the midrange frequencies only, leaving the bass and treble clean. 

This plugin has two modes of operation: Multi-output and Link Group

In Multi-output mode, the app takes a single channel of input and splits it into multiple output channels. 

Link group mode is a fallback support mode for DAW apps that don't support multi-output audio units. In Link group mode you duplicate the input track several times, once for each frequency band. Then the plugin filters out all but the selected bands on each of your duplicate tracks so that each track contains just one frequency band. It's called "Link Group" because when you duplicate the plugin across two or more tracks you can link the instances together across tracks so that the controls that set the transition frequencies between bands automatically synchronise between all the tracks in the group. 


HOW IS LINK GROUP MODE DIFFERENT FROM USING HIGHPASS AND LOWPASS FILTERS IN AN ORDINARY EQ TO SEPARATE THE BANDS?

Whenever you play two copies of the same track simultaneously you must pay attention to phase alignment. For example, if you copy a track and invert the phase on one copy then the two copies will cancel each other out and you'll get no sound at all. Similarly, if you duplicate a track and process filters separately on each copy, when you combine the two copies back together you will usually get phase interaction at certain frequencies, causing some frequency ranges to be boosted and others attenuated. To avoid this, you would need to use crossover filters that are designed to preserve the phase relationships between each of the bands. The UI of this plugin makes it look like each band is created with a single lowpass and highpass filter pair but that is not the case. In addition to the lowpass and highpass filters we also need several phase compensation filters. Although that could be done with an ordinary EQ plugin it would be quite complicated to configure and test to ensure that no unwanted phase cancellation occurs.  

WHAT FILTERS DOES THIS APP USE?

They are second-order Linkwitz-Riley IIR crossover filters. We use IIR filters to so that when you use many of our plugins in series for real-time performance you don't add audible latency to the signal.


ABOUT THE BEAT COMMUNITY

We designed this app in collaboration with mr. Ali Ahmet who manages the Beat Community group on facebook. The beat community is a forum for discussion of topics related to mobile music production. It often features special promotions and app give-aways and it's curated so that the forum stays on topic and doesn't get spammed with advertisements. 

Beat community facebook group: https://www.facebook.com/groups/1504577553125121/

## Key features

- Splits audio into up to four frequency bands
- Enables multiband processing with standard effects
- Multi-output mode for direct channel separation
- Link Group mode for DAWs without multi-output support
- Phase-preserving crossover filters
- Uses Linkwitz-Riley IIR crossover filters

## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/multiband/id1522438777/reviews.md

### 5/5 — Peak

*2025-12-27*

Does what it says with no issues.

### 5/5 — Subtle Gem… 💎

*2024-11-10*

Oh my gosh. Had it for a while but only used it as a utility to trigger sidechained bass stuff. 

But the more I play around with it, the more its MANY uses start to unfold - from the basic and utilitarian all the way on to wildly creative sound design stuff.

Have you got a phase issue in a particular band zone that you can’t seem to fix with eq alone? Park this effect on the channel and center a band splitter to the affected zone, then just dial in as needed.

Or how about a modulated bassline split three ways with separate modulation *on each band* - a compressor on the sub, distortion on the mid, and sideband-only reverb on the highs, nice and out of the way of the lows yet spacious and huge? Or motion multi-fx on EACH band?

You can even use it on a fully mixed track to kind of unmix/remix, or on a master channel mix to control and finesse the spectrum as needed.

There are a LOT of other creative applications to be discovered. Cannot overstate how powerful this is as a corrective and creative tool. Big thanks to the dev.

### 5/5 — dasja

*2023-03-20*

mal sehr praktisch!

### 3/5 — Nice but

*2022-04-21*

Very useful indeed and I want to love it but it’s very unstable and crashes, sometimes only band one will show so you have to reset all the time. It can render a whole track silent sometimes. I know it’s free but it needs to be better,,,I would be willing to pay for it if it were.

### 1/5 — GarageBand not supported

*2021-03-14*

This app claims that it works in GarageBand, but it doesn’t. It doesn’t show up in the auv plug-ins list or in the inter-app list. I’ve refreshed both GarageBand and this, tried reinstalling, still doesn’t show up. I get that GarageBand has limitations, but don’t tell people it’ll work if it doesn’t.

### 3/5 — Great concept, Buggy

*2021-03-13*

It immediately crashes Auria Pro when I load it. Hopefully, this will be fixed in an update.

### 5/5 — Nails it

*2021-02-03*

So simple and so effective. My primary use case is to seperate frequency ranges from a mono edrum for selective processing. Yes, you can also use separate EQs to achieve this, but this will end in a more complex routing which is error prone. I am using Multiband only in AUM which supports multi out. Perfect. All parameters are even MIDI mapable.

### 5/5 — clever & badass

*2021-01-22*

non seulement génial, mais aussi chanmé !

### 5/5 — So useful and free!

*2021-01-20*

Thank you!

### 5/5 — Incredible!

*2021-01-20*

This is really an amazing app. I can’t think of any other like it and it opens up all kinds of possibilities for surgical manipulation of sound, both on a utility level and even more so on an experimental level. 

Highly recommended!!!

## Frequently asked questions about Multiband

### What is Multiband used for?

Multiband splits an audio signal into separate frequency bands, allowing you to apply effects like compression or chorus to specific ranges, such as bass or treble, for advanced audio manipulation.

### How does Multiband's Link Group mode work?

In Link Group mode, you duplicate your input track for each band. The plugin filters each track to contain only one frequency band, and you can link plugin instances to synchronize frequency transition controls across tracks.

### Why is Multiband's phase preservation important?

When combining processed audio bands, phase interaction can cause unwanted frequency boosts or attenuations. Multiband uses specialized crossover filters designed to preserve phase relationships, avoiding these issues.

### What type of filters does Multiband use?

Multiband utilizes second-order Linkwitz-Riley IIR crossover filters. These IIR filters are chosen to minimize audible latency when using multiple plugins in series for real-time performance.

### Is Multiband available on all devices?

Multiband is supported on iPhone, iPad, and iPod, making it accessible for a range of Apple mobile devices used in music production.

### How often is Multiband updated?

Multiband was last updated on January 20, 2021, with version 1.0. Information on future update frequency is not provided.

### What is the age rating for Multiband?

Multiband has an age rating of 4+, indicating it is suitable for users of all ages and does not contain mature content.

### Does Multiband have ads?

No, Multiband does not contain advertisements. It is a free application without any ad-supported elements.

## Version history (last 1 release)

### 1.0 — 2021-01-20

No release notes.

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All apps by Blue Mangoo Consulting Company Limited: https://appshunter.io/developer/1475107602

## Related topics

[multiband](https://appshunter.io/ios/topics/multiband) · [multiband haas effect](https://appshunter.io/ios/topics/multiband-haas-effect) · [bleass multiband compressor](https://appshunter.io/ios/topics/bleass-multiband-compressor)

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*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 2026-08-30.*