AUDIO PROCESSING DEVICE, SYSTEM, USE AND METHOD

The invention relates to an audio processing device, system, use and method. A hearing aid comprises a first microphone, a speaker, a first analog-to-digital converter, a first input unit comprising afirst analysis filter bank which is configured to convert the first time domain input signal to a number NI,1 of first input frequency bands, a first frequency band bundling and allocation unit whichis configured to bundle adjacent first input frequency bands and to allocate first frequency bands to be processed to a number NP,1 of first processing channels, a memory unit, a signal processing unit configured to process the first frequency bands to be processed in the number NP,1 of first processing channels,1 of first input frequency bands, and wherein the first frequency band bundling and allocation unit is configured to generate a first bundling and allocation scheme which determines the bundling of the first NI,1 input frequency bands and the allocation of the first frequency bands tobe processed to the first