"Iain M Churches" wrote in message

"Stewart Pinkerton" wrote in message
...
On 30 Oct 2004 09:52:35 GMT, John Phillips
wrote:

As I understand it, the vinyl noise floor above 1 kHz can certainly
take the dynamic range of a good tape recording.

Not really, since the replay response drops at -6dB/octave above 2
kHz.

As indeed it must to be the inverse of the recording curve which rises
by the same amount. The replay curve is determined of three time
constants, 318, 3180, and 75µS.

Nice job of missing the point on two separate grounds.

(1) If you premphasize with a +6 dB octave slope, dynamic range goes down
with a minimum of a -6 dB slope.

(2) If you use a -6 dB per octave demphasis, then of course background noise
drops with a -6 dB slope compared to no demphasis.

Bottom line - vinyl has dynamic range problems at high frequencies, while
digital midia need not.

Separate topic - why vinyl also has dynamic range problems at low
frequencies.