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FLAC sampling
FLAC sampling
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Old 3rd June 2013, 10:45 AM   #1
jacques antoine is offline jacques antoine  France
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FLAC sampling
Default FLAC sampling

Not sure it's the right forum to ask this but is it possible to detect if a lossless FLAC audio file has been upsampled from a lower bit rate compressed format?
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Old 8th August 2017, 08:31 AM   #2
jacques antoine is offline jacques antoine  France
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FLAC sampling
For anyone interested: Spek, a free program shows a spectrogram of any music file (mp3, FLAC).
Upsampling can be easily detected that way.
Spek – Free Acoustic Spectrum Analyzer / Spectrogram Viewer
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Old 8th August 2017, 09:47 AM   #3
davidsrsb is offline davidsrsb  Malaysia
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Not easy if the upsampler has added dither and even a little white noise to conceal their efforts
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Old 8th August 2017, 10:31 AM   #4
jacques antoine is offline jacques antoine  France
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FLAC sampling
Dithering by itself does very little while upsampling.
I agree that dithering and adding white noise would be particularly vicious!
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