The app processes sound received by the microphone in real-time, then delivers the processed sound via headphones. Advanced connectivity options allow the user to customize the solution to their needs by optionally combining various audio hardware. The BioAid research algorithm forms the core of AUD -1’s processing strategy. AUD -1 is the evolution of mobile-platform assistive listening software, providing numerous advanced features that were requested for inclusion by users of the original BioAid app. No other assistive listening software currently provides either the depth of user control, or the sophistication of the sonic processing.