17 Dec
2002
17 Dec
'02
7:54 a.m.
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 @ 2400 Hertz.
'zero bit': one sinusoidal cycle @ 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.
--
tim lindner tlindner(a)ix.netcom.com