Re: cassette data specs req.

["OOAEOOMSNR" <abuse@aol.com>]

"Bill Bach" <bbach@cncdsl.zerospam.com> wrote in message
3DF3B7CE.7287013E@cncdsl.zerospam.com">news:3DF3B7CE.7287013E@cncdsl.zerospam.com...
> Is this for a data transfer program or an audio sampling program?
>
> The Cassette port, just like the speaker, uses a software-based switch
> (softswitch) which toggles the state of the device (speaker or cassette
> output).  As such, there is no "audio encoding" format for sound at all,
but
> rather the source program must toggle the softswitch at a given rate to
make an
> audio signal.

No.  Rather than get into a discussion of modulation and D/A converters, let
me just say that what I'm after is to understand what the Apple does to
convert programs to sound and back again.  Does it use frequency shift
keying like a 300 baud modem?  What frequencies mean what to it?

> If you are trying to do a data transfer, it is MUCH easier to use a SSC
and
> simple serial transfer.

But that wouldn't be any fun.