computer audio tape formats

From: Bill Allen Jr <n8uhn_at_yahoo.com>
Date: Wed Dec 18 20:44:18 2002

I seem to remember that eather "radio electronics" or
"rainbow" magazine had an article on how to build a
computer audio tape conditioner.

it was for the coco.


On Tuesday 17 December 2002 9:50 pm, tim lindner
wrote:
> I am looking for information regarding how various
computers wrote
> information to audio tapes.
>
> For example, the Tandy Color Computer wrote ones and
zeros to audio
tape
> in the following format:
>
> 'one bit': one sinusoidal cycle _at_ 2400 Hertz.
> 'zero bit': one sinusoidal cycle _at_ 1200 Hertz.
>
> The bit rate is variable on a CoCo tape. But
averages to about 1500
bits
> per second.
>
> I am contemplating creating an audio tape anaylzer
to help me recover
> some data. I would like to make the program useful
to thoes outside
the
> Color Computer community. But first I need to
understand all of the
> different methods used to put data on audio tape.


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Received on Wed Dec 18 2002 - 20:44:18 GMT

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