We are currently investigating reported issues with Mixlr for iOS and AudioBus
Audiobus is an application available only on iOS devices, which allows audio routing from one app to another. This means that you can take the audio from one iOS app and route it to another.
Since late 2014 Mixlr has supported Audiobus, meaning that you can take audio from one of the many supported input applications and broadcast it live on Mixlr. It also allows you to apply effects to your simple microphone input using the one of the host of the compatible effects apps.
To start using Audiobus with Mixlr you need to download it from the App Store. We've also made the following video to help provide some inspiration for what's possible:

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