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24/88.2 FLAC clip from Handel's Messiah, Linn Records
mixminus1
post Feb 12 2011, 22:27
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Attached File  13._.Chorus.For.unto.us.a.child.is.born.1min21sec_1min45sec.flac ( 7.74MB ) Number of downloads: 991


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"Not sure what the question is, but the answer is probably no."
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2Bdecided
post Mar 4 2011, 14:02
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Here are bits 17-24 (only) from each sample of the above file, moved to bits 2-9 so you can hear them.

Warning: quite loud! (Far louder than the original file).
Warning: DC offset (bit 1 not used, hence all values are positive).

Attached File  13._.Chorus.For.unto.us.a.child.is.born.1min21sec_1min45sec_proc.flac ( 4.52MB ) Number of downloads: 164


EDIT: generated in MATLAB using manual bit shifting. DSP or assembler would have been far more efficient, but I believe the MATLAB result is correct.

This post has been edited by 2Bdecided: Mar 4 2011, 14:30
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IgorC
post Mar 6 2011, 13:18
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QUOTE (2Bdecided @ Mar 4 2011, 10:02) *
Here are bits 17-24 (only) from each sample of the above file, moved to bits 2-9 so you can hear them.

Warning: quite loud! (Far louder than the original file).
Warning: DC offset (bit 1 not used, hence all values are positive).

Attached File  13._.Chorus.For.unto.us.a.child.is.born.1min21sec_1min45sec_proc.flac ( 4.52MB ) Number of downloads: 164


EDIT: generated in MATLAB using manual bit shifting. DSP or assembler would have been far more efficient, but I believe the MATLAB result is correct.


Don't want to be harsh but what purpose of such extraction? Point me if I am wrong but separated less significant bits (17-24) don't mimic the original signal and contain pure quantization differences/errors (noise).

P.S. I don't know if it's placebo but I hear some background intelligible sounds

This post has been edited by IgorC: Mar 6 2011, 13:26
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bandpass
post Mar 6 2011, 14:14
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QUOTE (IgorC @ Mar 6 2011, 12:18) *
Don't want to be harsh but what purpose of such extraction? Point me if I am wrong but separated less significant bits (17-24) don't mimic the original signal and contain pure quantization differences/errors (noise).

P.S. I don't know if it's placebo but I hear some background intelligible sounds

Whatever should be in those LSBs, it clearly shouldn't be white noise.

P.S. If you listen to white noise for long enough, you'll eventually hear the sound of monkeys typing out the works of Shakespeare... wink.gif
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2Bdecided
post Mar 7 2011, 12:19
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QUOTE (bandpass @ Mar 6 2011, 13:14) *
Whatever should be in those LSBs, it clearly shouldn't be white noise.
?

When you quantise a signal where the entire signal spectrum is well above the quantisation level, the difference between the original and quantised version (i.e. the quantisation noise) is white noise.

It obviously has something to do with the original signal (it's the last 8 bits of it in this case), but whether it is any way correlated or even meaningfully related to the original signal is another question.

Anyway, I think the discussion would be better continued in the original thread...
http://www.hydrogenaudio.org/forums/index....showtopic=86649

Cheers,
David.
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