Re: cassette data specs req.

[Bill Bach <bbach@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.

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

If you are trying to capture audio output from the cassette port, then it is
simple enough to simply have your Windows apps sample the sound at the
appropriate frequency (i.e. the sampling rate must be at least twice the highest
frequency you expect to capture).
    BB

OOAEOOMSNR wrote:

> i'd like to write a windows app. to decode audio from the Apple IIe cassette
> port.  where could i find information about the apple's audio encoding?