Manual

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5.2.2 mp3-HD
mp3-HD 16-bit dither/truncation (correct dither/truncation)
The noise floor of the input signal is displayed as around -125dB (~30dB down from -96dB).
The diff signal is indicating -180dB (the 16-bit integer input is identical to the 16 bit integer
post-codec, with no ‘inters’). The bit meter shows no activity in bits greater than 16.
mp3-HD 20-bit dither/truncation
The noise floor of the input signal is displayed as around -150dB (~30dB down
from -120dB).
The diff signal is indicating -125dB with overtones at around -100dB (this is an error
condition because the 20-bit input contains information that the 16-bit output of the codec
cannot reproduce).
The bit meter shows incorrect dither activity in bits 17 to 20.
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