audiophile sound on FreeBSD ?

Erich Dollansky freebsd.ed.lists at
Wed Apr 25 17:56:38 UTC 2018


On Wed, 25 Apr 2018 12:12:49 +0100
Steve O'Hara-Smith <steve at> wrote:

> On Wed, 25 Apr 2018 18:53:30 +0800
> Erich Dollansky <freebsd.ed.lists at> wrote:
> > After noticing that he has an original LP of
> > a CD of mine, we plugged normal digital equipment in. Every child
> > could hear the difference.  
> 	There are substantial differences between what is recorded on
> an LP and what is recorded on a CD even if they start from the same
> master tape. 

the LP was even purchased before CDs were even invented. So, real old
stuff with all the other noises a CD does not have.
> 	The audio for the LP will have been processed with RIAA (to be
> reversed by the pre-amp on playback) while the audio for the CD will
> have been filtered sharply to prevent aliasing.
> 	Then the audio for the LP will be mastered onto the LP with
> some care (possibly compression being applied) to ensure that the
> groove spacing is adequate to the amplitude being recorded while the
> audio for the CD will be digitised.
> 	The playback pitch accuracy will depend on the rotation speed
> of the turntable for the LP and for the readout speed of the CD
> mechanism for the CD (which may or may not be buffered to prevent
> mechanical jitter*).
> 	IOW they're bound to sound different - as to which is more
> accurate you'd need to do a double blind test against the monitors
> the mixing engineer used (at least I *think* that's the most valid
> reference).
> *: I recall reading many years ago that some recording
> engineers could tell which machine a digital recording was mastered on
> because of the characteristic timing jitter imposed by the machine
> onto the recording.
There is not doubt for me.


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