Re: 10x CLOAD (fwd)

From: Martijn van Buul (
Date: 1999-10-05 14:44:12

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 - -
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