AUM - Audio Mixer
"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." from the App Store description.
App type: App
App store link: 
AUM - Audio Mixer
Developer: Kymatica AB
Developer AB Forum Handle: @j_liljedahl
Additional Info
Tips and Tricks
Videos
There are numerous links to videos by various people on the developer's website.
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