danadam
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Nightwish - Highest Hopes (Limited Edition):
The track with highest true peak was "Sacrament of Wilderness" when using "auto" and "Deep Silent Complete" when using SoX.
I also checked the "Deep Silent Complete" with SoX command line:
I did x2, x4, x8, x16 and it's the same +2.74 dBTP.
Lastly I used the filter coefficients (in attachment) from ITU-R BS.1770-5 - Algorithms to measure audio programme loudness and true-peak audio level (PDF):
and it is +2.53 dBTP.
EDIT: And as a bonus, using two different filters in ffmpeg:
Code:
auto
x2 1.092665 +0.77 dBTP
x4 1.114916 +0.94 dBTP
x8 1.121315 +0.99 dBTP
SoX Normal
x2 1.370465 +2.74 dBTP
x4 1.370464 +2.74 dBTP
I also checked the "Deep Silent Complete" with SoX command line:
Code:
]$ sox 11_DeepSilentComplete.flac -n gain -10 rate 88200 stats
Overall Left Right
Pk lev dB -7.26 -7.26 -9.90
Lastly I used the filter coefficients (in attachment) from ITU-R BS.1770-5 - Algorithms to measure audio programme loudness and true-peak audio level (PDF):
Code:
]$ sox 11_DeepSilentComplete.flac -n gain -10 upsample 4 fir bs1770.txt stats
Overall Left Right
Pk lev dB -7.47 -7.47 -9.84
EDIT: And as a bonus, using two different filters in ffmpeg:
Code:
]$ ffmpeg -i 11_DeepSilentComplete.flac -af ebur128=peak=true -f null - 2>&1
...
True peak:
Peak: 2.6 dBFS
]$ ffmpeg -i 11_DeepSilentComplete.flac -af loudnorm=print_format=json -f null - 2>&1
...
"input_tp" : "2.63",
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