I am looking for a tool which limits the maximum loudness* of all applications to a custom value. It should ideally clamp the loudness to the specified value or – if such a feature is not available – just cut it off.
Windows (8.1 Pro 64-bit to be precise)
Adjustable maximum loudness value (e.g. via manual calibration)
Catches all sounds from the whole system
Clamps the sounds or just cut it off
Nice to have
Notifications when the sounds exceed the set limit
Multiple profiles, e.g. one for speakers and one for a headset
* loudness = dB level emitted by the playback device.