recording audio from rs232

[w1k]

hey, its possible to record audio communication with pc - sio2pc from rs232?

[Rybags]

No... and where would the audio be coming from anyway?

 

The SIO noise you hear is generated by Pokey.

 

And when reading real tapes, the tones on the tape are converted to 0/1 by the tape drive. The audio track only gets mixed with other audio from the Atari, there's no way you can monitor or modify it.

 

AFAIK, no version of an APE or SIO2PC interface includes the audio feature.

[w1k]

hm.. youre right anyway. i try use advanced serial port monitor for rec, but com1 is bussy (sio2pc).. im only want experimenting:)

[Rybags]

You could easily enough do a program that generates a raw file you could convert to WAV with an emulator.

 

CAS files... there's already WAV2CAS which when played back sound near identical to a real tape.

 

ATR files... a bit trickier. You'd need to convert every byte to a sequence of start/8 data/stop bit audio sequence. Plus, add in the few extras for stuff like command, acknoledge, checksum. But you'd probably end up with something that sounded like a disk loading with noisy I/O turned off.

 

Not quite sure how you'd do it properly... maybe overlay the parts that would be data coming to the computer with a square wave of the frequency corresponding to the default bitrate.

[analmux]

And when reading real tapes, the tones on the tape are converted to 0/1 by the tape drive.

In case of CLOAD, yes.

 

However, doing a CSAVE, then the Atari itself generates the tones. So, how does SIO2PC deal with that then?

 

Or wouldn't that matter in this question?

Edited March 9, 2011 by analmux

[w1k]

sio2pc only for experiment.. i dont want save sounds from tape

[Rybags]

Fairly sure that no version of APE, or any other similar emulation can handle tape writes.