A multichannel realtime audio software for Tomatis practitioners (a digital implementation of an Electronic Ear for APP).

APP Ear uses input from sound files and/or microphone and performs complex digital signal processing (filtering according to the level of the input signal, timed filters, time stretching, etc.) on those signals on currently up to five separate stereo channels. Mac OS X was used as operating system for this software to leverage Apples CoreAudio framework for high quality audio (up to 96 kHz sample rate with 24 bits and a latency of down to 15 Bytes for microphone input).

The multichannel input an output is done exclusively via RME Fireface devices.

Since this software is used to treat patients, the results of the DSP had to be carefully tested both by measuring the filter curves and by listening to the results and fine tuning the filtering processes.