Airplay , HDMI audio output

I'm curious. Does audio output via Airplay or HDMI have increased volume in the treble ? I'm currently attenuating the treble by about 10db or higher compared to lower frequencies.


Aside from bit depth and samping frequency, which audio output provides better sound ? HDMI vs Airplay audio output...which has less jitter ?


Thanks.

Airplay , HDMI audio output
 
 
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