Audio system, calibration module, operating method, and computer program

A calibration unit (20) for an audio system (2), wherein the audio system (2) comprises:

• an audio source device (8) for generating a useful audio signal (18),
• an audio target device (10a,b) for the reception of the useful audio signal (18),
• a transmission path (12) for the useful audio signal (18) from the audio source device (8) to the audio target device (10a,b),
• a generator (4) for the generation of a pilot tone (6), which is to be transmitted in the direction from the audio source device (8) to the audio target device (10a,b) via the transmission path (12),
• at least one detector (16a-c) for the pilot tone (6) which is connected to the transmission path (12), having a detector output (24a-c) for a detector signal (Sa-c) which is dependent upon the detection of the pilot tone (6),
• wherein at least one of the defining parameters (P1,2) of the pilot tone (6) is adjustable, and
• the calibration unit (20) incorporates an input unit (22) for optionally setting the parameter (P1,2)
• wherein, for at least one value (W1,2) of the parameter (P1,2), the detector signals (Sa-c) for all detectors (16a-c) in a known and error-free transmission path (12) indicate the detection of the pilot tone (6).