opaqueice;194753 Wrote: > If instead we take a S/N of a million (60 dB), we get a capacity of .6 > Mb/s, or a bit less than half of CD capacity. > > And that's the theoretical best possible capacity given a bandwidth of > 30kHz and 60 dB of S/N, both of which are pretty generous assumptions. > > So it seems that, at least at the level of theoretical information > capacity, vinyl is considerably worse than CD - which really shouldn't > be a surprise.
A couple of caveats to your calculations. 1) IIRC, a new Sheffield direct-to-disk LP had a signal-to-noise ratio of around 85dB. 2) LPs can have signal up to 30dB below the noise floor. There is no signal below the noise in a CD, but there can be plenty of signal below the noise on an LP, especially low level ambience cues. Using this figures, you'd need 115 DB signal to noise ratio for a CD to equal a new direct-cut LP. To back this up with an anecdote, I spent a lot of time a few years ago playing with digital recording of high-quality LPs. There was much more difference in sound quality between using 16 bit sample depth and 24 bit sample depth than there was between sampling at 48kHz and 96kHz. At the time, 96kHz sounded a tad better than 48kHz, but now my aging ears can't tell the difference. However, with a 24-bit sample depth, the digitized LP recording sounded indistinquishable from the LP. With a 16-bit sample depth, it sounded noticibly worse, you know, like a CD! One cool thing is that with a 24x48kHz recording of an LP, you can use digital noise reduction filters and get a result that is sonically superior to either the orignal (worn) LP or the equivalent CD. (I suppose that I should add that my turntable setup with phono preamp cost about $8000, so your mileage might vary.) And, might I say, thank goodness that the SB3 plays 24-bit material! Regards, Kim -- krochat ------ SB3 (+linear) -> Big Ben -> TacT RCS 2.2X -> 2xS2150 -> Vandersteen 3a Signature + TacT W210 ------------------------------------------------------------------------ krochat's Profile: http://forums.slimdevices.com/member.php?userid=6579 View this thread: http://forums.slimdevices.com/showthread.php?t=34379 _______________________________________________ audiophiles mailing list [EMAIL PROTECTED] http://lists.slimdevices.com/lists/listinfo/audiophiles
