I guess I'm missing a sense of what would be considered a "big" or "small" difference in all these plots... Again, they sound exactly the same to me, after some level matching. Loaded the files in a random generator and ran a paired preference test on the first 30 seconds or so. I got 7-3 preference for the re-mastered version, which is not really statistically significant, don't have the time now to significantly increase the samples number.

Not sure if this was previously answered, how is the PK metric calculated?

Note: both files don't play properly in WASAPI exclusive mode; sound is jagged, like, play stops every 200mS or so, for long enough to make impossible to listen to. Works fine without exclusive mode. Win 10 latest patched version.

Settings:

Gain:True, Remove DC:True

Non-linear Gain EQ:False Non-linear Phase EQ: False

EQ FFT Size:65536, EQ Frequency Cut: 0Hz - 0Hz, EQ Threshold: -500dB

Correct Non-linearity: False

Correct Drift:True, Precision:30, Subsample Align:True

Non-Linear drift Correction:False

Upsample:False, Window:Kaiser

Spectrum Window:Kaiser, Spectrum Size:32768

Spectrogram Window:Hann, Spectrogram Size:4096, Spectrogram Steps:2048

Filter Type:FIR, window:Kaiser, taps:262144, minimum phase=False

Dither:False bits=0

Trim Silence:False

Enable Simple Waveform Measurement: False

Discarding Reference: Start=0s, End=0s

Discarding Comparison: Start=0s, End=0s

Initial peak values Reference: -6.563dB Comparison: -0.266dB

Initial RMS values Reference: -23.558dB Comparison: -15.638dB

Null Depth=5.459dB

Phase inverted

X-Correlation offset: -16789 samples

Residual error too large 3.728246898. Trying alternative drift correction method

Drift computation quality #2: Excellent (1.26μs)

Trimmed 0 samples ( 0.00ms) front, 0 samples ( 0.00ms end)

Final peak values Reference: -6.563dB Comparison: -8.889dB

Final RMS values Reference: -23.558dB Comparison: -24.32dB

Gain= 8.7444dB (2.7367x) DC=0 Phase offset=-380.702948ms (-16789 samples)

Difference (rms) = -20.92dB [-24.92dBA]

Correlated Null Depth=14.4dB [20.67dBA]

Clock drift: -0.34 ppm

Files are NOT a bit-perfect match (match=0.02%) at 16 bits

Files match @ 49.9921% when reduced to 3.66 bits

---- Phase difference (full bandwidth): 90.2281195832894°

0-10kHz: 105.78°

0-20kHz: 92.01°

0-24kHz: 90.23°

Timing error (rms jitter): 20.4ms

PK Metric (step=400ms, overlap=50%):

RMS=-21.6dBFS

Median=-22.9

Max=-13.8

99%: -15.47

75%: -19.4

50%: -22.94

25%: -32.04

1%: -57.59

gn=0.365409454656468, dc=0, dr=-3.38575459151237E-07, of=-16789.0000002714

DONE!

Signature: a911b4af92b90891658be9eb050a0679

RMS of the difference of spectra: -86.1671776658777dB

DF Metric (step=400ms, overlap=0%):

Median=0dB

Max=2.3dB Min=-8.4dB

1% > -4.09dB

10% > -0.82dB

25% > -0.36dB

50% > 0.02dB

75% > 0.33dB

90% > 0.78dB

99% > 1.57dB

Linearity 2.6bits @ 0.5dB error

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