Sometimes people want to listen at low volumes but still have it sound similar to listening at normal volume. Unfortunately our ears cannot hear bass and treble as well as midrange at these lower volumes: Equal-loudness contour - Wikipedia.
RME solved this problem with a "loudness" feature that EQs different volume settings like this: Total Harmonic Distortion Measurements; Loudness - RME Audio ADI-2 DAC User Manual [Page 56] | ManualsLib
Wiim can do one step better by automatically detecting the reference 0 dB level using its built in microphone or the app microphone.
RME solved this problem with a "loudness" feature that EQs different volume settings like this: Total Harmonic Distortion Measurements; Loudness - RME Audio ADI-2 DAC User Manual [Page 56] | ManualsLib
Wiim can do one step better by automatically detecting the reference 0 dB level using its built in microphone or the app microphone.