A computer-implemented method for transforming audio input data into audio output data is provided. The method comprises receiving audio input data, providing background sound data by separating speech components from the audio input data by using a speech removal module, determining acoustic scene data, linked to an acoustic scene matching the background sound data, by using an acoustic scene classifier module, selecting a specialized noise reduction module based on the acoustic scene data, and processing the audio input data by using the specialized noise reduction module such that the audio output data is generated.