The UAC-232 Mix Control app can control the internal mixers of ZOOM UAC-232 USB Audio Converters. Connect the iPhone/iPad to the UAC-232 by USB to use it. Note: An Apple Lightning to USB 3 Camera Adapter is necessary when using it with an iPhone/iPad that has a Lightning connector. Features • Adjust the mix balance for direct monitoring • Adjust the mix balance of the mixer for streaming • Monitor mix levels • Adjust input signal levels • Monitor input signal waveforms • Set the loopback function