[sdiy] Synth data storage on tape

[James Patchell]

The most basic way to do it was FSK.  I designed a system with a tape 
backup in the early 80's...for the FSK modulator, I designed a simple 
circuit using a frequency divider to generate the two tones, for the 
demodulator, I used an XR FSK decoder...I don't remember what the part 
number was...but it was basically just a phase lock loop.  And those two 
items were just connected to a regular UART that was running at 300 
baud.  There were fancier interfaces, that could run at higher baud rates, 
but FSK was by far the easiest to implement.

At 11:09 AM 12/9/2005 +0100, Bart Provoost wrote:
>A lot of old synthesizers, drum machines,... use an audio signal to 
>import/export from/to tape.
>
>Is there any tool or information on how to create/read that audio signal?
>
>Would it be possible to write a software editor which uses such audio 
>signals to import/export from those machines?
>Or does such a program already exist (specific for one of those machines)?
>
>
>Bart
>--
><http://filters.muziq.be>http://filters.muziq.be

         -Jim
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