Marko Mäkelä wrote:
> On Tue, 5 Oct 1999, Martijn van Buul wrote:
>
> > Why bother? TurboTape has been developed -ages- ago, and works rather
> > nice.
>
> An audio CD has a sampling frequency of 44100 Hz, much more than the
> bandwidth of a C cassette.
*snap* That 10-times-speedup thing was relative to the original
ORIC-2 loading speed, ofcourse..
> Even 44100 bit/s would be theoretically possible if the "cassette read" input
> was edge-sensitive on both falling and rising edges. Maybe it is at least on
> some Commodores.
Well, I think that 44100 bit/s is most definately not doable. You assume
that it is possible to have the CD-player output up to 44K1 edges/second.
However, since every (decent) CD-player has a low-pass filter on it's output,
you most definately won't get these.
(The output of a CD-player is supposed to be filtered with a low-pass
filter muting everything above 22.5 Khz. Due to the fact that there's
no such thing as an ideal low-pass filter, there will be a certrain fraction
of higher frequencies present in the output signal, but 44k1 is a bit high)
--
Martijn van Buul - Pino@dohd.cx - http://www.stack.nl/~martijnb/
Visit OuterSpace: mud.stack.nl 3333
finger martijnb@stack.nl for my public key block
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