# AUM - Audio Mixer — Connect, route, mix, record!

> Flexible audio mixer, recorder, and connection hub for iOS devices. (iPhone/iPad app by Kymatica AB.)

- Source: https://appshunter.io/ios/app/aum-audio-mixer/id1055636344 (this page in markdown: same URL + `.md`)
- Developer: [Kymatica AB](https://appshunter.io/developer/522046659)
- Category: Music, Productivity
- Price: $24.99 with in-app purchases
- Rating: 4.70/5 from 524 App Store ratings · 313 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 13 MB
- Languages: American English
- Released: 2016-02-24
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/aum-audio-mixer/id1055636344/reviews.md

## What is AUM?

AUM is the flexible audio mixer, recorder, and connection hub for your iPad, iPhone and iPod touch.

Connect hardware inputs and outputs, Audio Unit extensions, Inter-App Audio apps, Audiobus, soundfile players, built-in signal processing and filters, in any configuration you want.

Route anything to anywhere with mix-busses, effect sends, audiobus ports, and external multi-channel audio interfaces.

Play hosted synths and instruments using the built-in keyboard or external MIDI controllers, or sequence them with AU MIDI plugins or from other apps using Virtual MIDI.

Record mixes, individual tracks, or both, straight into the storage space of AudioShare (no copying of files needed), with synchronized start and end for perfect loops.

Play back recordings, soundfiles and loops as channel sources in the mixer for backing tracks, further processing or mixing. Soundfiles can be opened from anywhere, including USB drives on iOS 13 and later.

Route and filter MIDI in any way you like using the MIDI matrix. Combine and filter MIDI endpoints using MIDI buses.

Synchronize everything with the transport clock and play in time with other apps or devices using Ableton Link. Connect external music machines and synchronize them with MIDI Clock.

Includes built-in processing nodes for various stereo processing, Mid/Side balance and conversion, EQs and filters, limiting, clipping and saturation. Or use any 3rd party Audio Unit extension or Inter-App Audio effect.

All controls in the mixer can be controlled via MIDI, including parameters of hosted and built-in plugins.

"A brilliant idea that has been brilliantly executed. Top-notch technical stuff and highly recommended" - MusicAppBlog

"Feature rich, powerful, intuitive, and simple to use" - DubSpot

"Executes live mixing with surprising ease, with a load of extensive features under the hood, quick snappy response on the screen and audio" - AudioNewsRoom

FEATURES

• High quality audio up to 32-bit 192kHz
• Clean and intuitive user interface with crisp vector graphics
• Unlimited number of channels
• Unlimited number of effect slots
• Inserts and sends are configurable pre/post-fader
• Internal busses for mixing, effect sends, signal splitting
• Supports multi-channel audio interfaces for both inputs and outputs
• Supports built-in speaker and mic, including stereo mic on devices that has it.
• Supports Audio Unit extensions, Inter-App Audio and Audiobus 
• Route MIDI output from Audio Unit extensions
• Supports Audio Unit multiple output and input busses (for side-chaining etc)
• Highly accurate transport clock
• Metronome with selectable output and optional pre-roll
• Sends host sync to Audio Unit plugins and IAA apps
• Play in time with Ableton Link, with Start/Stop support
• Slave external hardware via MIDI Clock
• FilePlayer with sync and looping with access to all your soundfiles
• Records straight into AudioShare storage space
• Record synchronized beat-perfect loops
• Built-in nodes for stereo processing, filtering and dynamics
• Latency compensation makes everything align at the outputs
• Optional manual compensation using TimeOffset
• Multiple Inter-App Audio / Audiobus output ports
• Audiobus state saving
• Built-in MIDI keyboard
• Fully MIDI controllable
• MIDI Matrix for routing MIDI anywhere
• MIDI filtering for any MIDI destination
• Combine MIDI sources or destinations using MIDI buses

BUILT-IN SIGNAL PROCESSING

• Stereo balance
• Stereo to mono
• Stereo panning
• Mid/Side balance
• Mid/Side - Stereo convert
• Invert Phase
• Parametric EQ
• Low-shelf filter
• High-shelf filter
• Low-pass resonant filter
• High-pass resonant filter
• LP/HP combo filter
• First order All-pass filter
• Second order All-pass filter
• Gain
• Hard clip
• Saturation
• Lookahead peak limiter
• System-provided Apple Audio Units

## Key features

- Connect hardware inputs/outputs
- Route audio and MIDI
- Host Audio Unit extensions
- Record mixes and individual tracks
- Synchronize with Ableton Link
- Built-in processing nodes
- MIDI control and routing

## Pricing and in-app purchases

Base price: $24.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Huge Tip | $9.99 | one-time |


## Chart rankings

- #50 in Top Paid · Music (US App Store)

## What do users think of AUM?

Overall sentiment: positive

**Pros**

- 👍 Excellent audio routing and mixing capabilities
- 🚀 Powerful and flexible workflow
- 💡 Seamless integration with AUv3 and IAA apps
- 👍 Intuitive and clean user interface
- 👍 Reliable and stable performance
- 👍 Responsive and helpful developer support

**Cons**

- 🐛 Occasional crashes or stability issues
- 💡 Lack of MIDI clock sync receive functionality
- 💡 Limited visual customization options (e.g. channel sizes)
- 🐛 Compatibility issues with some hardware interfaces

**Commonly reported bugs**

- Crashes or freezes when using certain plugin combinations
- Compatibility issues with iOS 15 and newer
- Inconsistent MIDI transport controls

**Most requested features**

- Add MIDI clock sync receive capability
- Implement a timeline/sequencer view
- Provide more visual customization options
- Improve support for external hardware integration

## Recent user reviews (10 of 313)

All indexed reviews: https://appshunter.io/ios/app/aum-audio-mixer/id1055636344/reviews.md

### 5/5 — This was an instant essential app for me

*2026-08-15, version 1.4.8*

Lots of things can be accomplished with AUM, so I’ll focus on what’s helped my workflow most- controlling hardware synths with iOS sequencer plugins like Fugue Machine Rubato, MidiStep, etc. There are other ways to do this but none are as quick, intuitive, and seamless as this delightful little app.

### 5/5 — External clock sync

*2026-07-24, version 1.4.8*

Just please add this. PLEASE!!! 
Otherwise - what everyone else has said.

### 2/5 — Forced to buy companion app

*2026-06-20, version 1.4.8*

Useless without AudioShare

### 5/5 — Must have

*2026-06-18, version 1.4.8*

I’ve had this app for probably eight years, but to be honest I’ve been getting more into it more in the last six months. Once I started to figure out a workflow to allow me to jam and then record those 4 and 8 bar jams in AUM and then being able to take those recordings and sequence them in BeatMaker 3 to finish a track. Perfect combo.

### 1/5 — Doesn't work

*2026-06-18, version 1.4.8*

Audio nor midi transmit through USB on any Roland Aira units, nor the TE OP1-Field

### 2/5 — MIDI CLOCK IN IS ESSENTIAL

*2026-06-15, version 1.4.8*

Great app, but overlooking MIDI clock is outrageous for such an app in this day and age. Dear dev, I understand your technical concerns but clock stability at the source is responsibility of the user, not yours. Let us users choose the sync method that best suits us. For those of us with no Ableton stuff, MIDI clock input is an essential feature.

### 5/5 — Awesome app

*2026-06-03, version 1.4.8*

Just needs midi clock in so I can use it with hardware and it would be perfect.

### 3/5 — 不能输入中文项目名称

*2026-05-29*

The AUM features are all very useful. It's just that when saving a session, I can't input Chinese.

### 5/5 — Sure, why not

*2026-05-29, version 1.4.8*

Has it's uses.

### 5/5 — Dangerously good live mixer and general AUv3 host

*2026-05-23, version 1.4.8*

Already good at live mixing and creating a windowed experience for your music apps that support it. It can become a full DAW with Koala Sampler and other AUv3 synths. It’s a bigger investment than it initially seems to fully enjoy but I have no regrets and fully recommend the app.

## Frequently asked questions about AUM

### What does AUM do?

AUM is a comprehensive audio mixer, recorder, and connection hub for iOS devices. It enables you to connect hardware inputs, Audio Unit extensions, Inter-App Audio apps, and more, allowing for flexible routing and mixing of audio signals. You can also record your mixes or individual tracks directly within the app.

### What are the key features of AUM?

Key features include high-quality audio up to 32-bit 192kHz, unlimited channels and effect slots, configurable inserts and sends, support for multi-channel audio interfaces, and integration with Audio Unit extensions, Inter-App Audio, and Audiobus. It also offers advanced MIDI routing, synchronization via Ableton Link and MIDI Clock, and built-in processing nodes.

### Is AUM free to use?

The application is available for free with in-app purchases. This model allows users to explore the core functionality before committing to additional features or expansions through purchases within the app.

### What devices is AUM compatible with?

AUM is designed for iPad, iPhone, and iPod touch devices. It leverages the capabilities of these iOS devices to provide a powerful audio mixing and recording experience.

### How can I use AUM for music production?

AUM is ideal for music production by allowing you to connect and mix various instruments and audio sources, apply effects, and record your performances. Its ability to host Audio Unit extensions and integrate with other audio apps makes it a central hub for creating complex audio setups on your iOS device.

## Version history (last 5 releases)

### 1.4.8 — 2025-11-23

- Fix layout issue when launching with iPhone in landscape orientation.
- Add setting for including Apple AUs.
- Add global armed track count indicator.
- Long-press REC button to un-arm recording for all channel strips.
- MIDI Keyboard: allow scrolling by simply dragging on its toolbar.
- Fix status bar layout on older iPads.
- Support up to 128 hardware channels.
- Work around iOS quirk where changing sample rate doesn't seem to work.
- Fix auto-disabling HW input when switching to internal mic, to avoid feedback.
- If recording stopped with failure, save it instead of discarding it.
- Improve rec error messages.
- Long-press navigator button to show/hide all plugins.

### 1.4.7 — 2025-01-11

# NEWS
- Add setting for how to exit plugin fullscreen: edge swipe or buttons.
- Add setting for initial window size: default/maximized.
- Allow right-edge swipe to show navigator also on iPhone.
- Plugin maximized: avoid top bar also on iPhone landscape.
- Plugin maximize/fullscreen: use textual edge swipe hints.
- Plugin fullscreen: Ignore edge swipe near center of screen width.
- Show channel rec time as bar:beat, but switch to 'tail...' while recording tail.
- Built-in keyboard: make keys respond also in the area below them.
- MIDI matrix: indicate destinations with active MIDI filtering as yellow.

# FIXES
- Fix rare crash when opening midi destination view.
- Fix laggy built-in keyboard in some situations.
- Add work-around for buffer size blocked by Siri on some devices.
- Fix iPhone orientation issue where interface could become upside-down.
- Reset MIDI destination filters when clearing session.
- Clear connections to 'MIDI Control' when clearing session (but not on session load).
- Minor tweaks.

### 1.4.6 — 2024-12-22

NEWS:

- Add AUv3 clock divider/multiplier setting.
- Plugin window modes: Default, Custom, Maximized, Fullscreen.
- Swipe from top screen edge to exit plugin Fullscreen mode.
- Add the 'Navigator', a list of all channels and nodes for quick navigation and showing/hiding plugins.
- Swipe from right screen edge while plugin is maximized/fullscreened to show Navigator.
- Move Bookmarks into Navigator.
- Snap plugin window to screen edges when moving/resizing.
- Add plugin window grid snap, enable it in the settings menu.
- Add tail-recording: tapping pause will continue recording until you tap REC.
- Enable Apples system-provided Audio Units on iOS 13 or later.
- Change 'Show Plugin' to new 'Show / Hide Plugin' toggle action.
- Add 'Show & Front Plugin' action that always shows the plugin.
- Add RELOAD in node long-press menu. Reloads the node, preserving state.
- Ask before ejecting node.
- Add 'Reset Help Hints' in settings menu.
- Add app icon long-press shortcuts: Restore Windows, Open Default Session, Open Last State.
- Tap AUM background to bring keyboard focus back to AUM. (AUv3 plugins will take keyboard focus when touched).
- Change tap-tempo keyboard shortcut from § to T. 
- Add MMC Pause command support.
- Show alert when invalid filename characters has been replaced.
- Channel record time display is now in min:sec format.
- Try to Trash deleted sessions instead of actually deleting them.
- Update users guide.
- Don't show Ableton Link notifications.
- Update to Ableton LinkKit 3.2.1
- Various minor tweaks and fixes.

FIXES:

- Use h.m.s instead of h:m:s in default preset & session name.
- Fix initial silent gap when starting recording from stopped state.
- Fix intro logo jump when status bar is shown.
- Don't hide file extension when renaming folder.
- Fix REC button flashing when loading project while transport playing.
- Fix node slot load-animation glitch on iOS 17+
- Improve consistency of close-buttons on iPhone.
- Don't allow dragging plugin window if touch is inside plugin UI.
- Fix empty plugin window if plugin is closed and re-opened before dismiss animation finished.
- Preserve main parameter selection when reloading crashed plugin.
- Ensure old node is released fully before reloading it.

### 1.4.5 — 2023-09-13

- Add setting to show system status bar.
- Add some close-buttons on various popup views.
- Improve waiting for save at app termination.
- Keep track of unmatched state when loading AUv3 MIDI mappings, and try to re-apply it if the available parameters changes.
- Fix audio engine not restarting when coming back from background.
- Show name of currently loading node when loading state.
- Replace : with . in filenames since : is not allowed in some file systems.
- Add Share button in Engine Info to copy info to pasteboard, for improved user support.
- Workaround minor Ableton Link glitch, fixes FilePlayer not starting at some tempos.
- Fix some alert popups appearance in combination with some iOS accessibility settings.
- Various minor tweaks and improvements.

### 1.4.4 — 2023-06-14

- Internal tweaks regarding samplerate and buffer size changes
- Improve plugin window bypass detection
- Fix iPadOS 16 launchscreen layout bug
- Tweak handling of invalidated/crashed AUs
- Avoid interrupting the audio engine if microphone is muted
- Handle new audio port types
- Add advanced section in Engine Info
- Enumerate all audio interface channels even if they're not listed by the device. (For example ESI GIGAPORT eX)
- Long-press project/recording browser EDIT button to show hidden files
- Strip leading and trailing dots when generating or renaming filenames
- LP/HP Filter: ensure coeffs update on init and after sample rate change
- Add a 'last opened' sort option
- Try delaying AU release if plugin crashed
- Keyboard shortcut: use § instead of TAB for tap tempo
- Tweak presentation of 'Save in Plugin' for plugins not supporting system-wide user presets
- Fix saving of multiple tempo-presets with the same tempo

## Apps similar to AUM

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Cubasis 3 - DAW & Music Studio](https://appshunter.io/ios/app/cubasis-3-daw-and-music-studio/id1207839273) | 4.6 (3,456) | $49.99 | Music |
| [BandLab – Music Maker & Beats](https://appshunter.io/ios/app/bandlab-music-maker-and-beats/id968585775) | 4.7 (500,118) | Free | Music |
| [Voloco: Vocal Recording Studio](https://appshunter.io/ios/app/voloco-vocal-recording-studio/id1052970183) | 4.8 (84,499) | Free | Music |
| [Music Editor: DJ Mixing Studio](https://appshunter.io/ios/app/music-editor-dj-mixing-studio/id1213313896) | 4.3 (7,437) | Free | Music |
| [Tape It - Pro Audio Recorder](https://appshunter.io/ios/app/tape-it-pro-audio-recorder/id1576341885) | 4.7 (849) | Free | Music |
| [Audio Editor - Music editor](https://appshunter.io/ios/app/audio-editor-music-editor/id1493256837) | 4.5 (29,802) | Free | Music |

## More apps by Kymatica AB

- [AudioShare](https://appshunter.io/ios/app/audioshare/id543859300)
- [SECTOR](https://appshunter.io/ios/app/sector/id618095247)
- [The Oscillator](https://appshunter.io/ios/app/the-oscillator/id640819682)
- [AUFX:Space](https://appshunter.io/ios/app/aufxspace/id665650685)
- [AUFX:Dub](https://appshunter.io/ios/app/aufxdub/id678982701)
- [AUFX:PeakQ](https://appshunter.io/ios/app/aufxpeakq/id781852954)

All apps by Kymatica AB: https://appshunter.io/developer/522046659

## Related topics

[record audio mixer](https://appshunter.io/ios/topics/record-audio-mixer) · [audiobus](https://appshunter.io/ios/topics/audiobus) · [audio mixer studio](https://appshunter.io/ios/topics/audio-mixer-studio) · [kymatica ab](https://appshunter.io/ios/topics/kymatica-ab)

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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 2026-08-24.*