Re: Data/program storage questions

2005-12-20 Thread Kichigai Mentat

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On Dec 19, 2005, at 14.01, J Worgan wrote:

Can data and programs be sent via modem to microphone input and  
recorded on

a cassette or reel to reel tape recorder?
Well, in theory... After all, the data is analog audio, *the* most  
compatible format on the planet. But I suppose the question here is  
why. And the biggest trick would be getting your computer to output  
data over the modem line. I remember just trying to get my old Linux  
desktop to act as a dial-up-to-broadband bridge, and that was  
practically impossible.


Then loaded through modem input from the cassette or reel to reel tape
recorder output?
Again, this is going to require massive amounts of tinkering and  
hacking to get your modem to do any of this.


What modem output wires need to be used (or not used) or adapter to
accomplish this?

Just Google for telephone pin out or RJ-10 pin-out


What modem input wires need to be used (or not used) or adapter to
accomplish this?

See above.


What modifications of modem software need to be made, if any?
Ahh, good, the hardest part right here. I suppose you'd need a whole  
new program designed from scratch to just send raw data out through  
the modem. It, to me, sounds like a rather large project, since not  
only would you have to design the software to get the modem to send/ 
receive data, but you'd also have to design software to either take  
the data files and send them over the modem, and a program to do vise  
versa.


Would it be simpler to send it via modem to a telephone and record  
it off

that phone?
Possibly, but probably not. You still have to deal with controlling  
the modem directly for sending of raw data.


Could it be played back over the phone and uploaded via a modem?
Well, we might just have a loss of too much quality, going from  
computer to phone to cassette to phone to computer. Again, if this is  
any simpler than the original plan, only marginally so.


If any pair of the above (output and input) can be done to a tape  
recoder,
then could it be digitized and burned onto a CD, possibly loaded  
from a CD

player audio output?
Now this sounds like the easiest thing right here. Cassette to CD and  
using the CD to load sounds like no problem. However, if you're  
planning on compressing the data using a lossy encoder (AAC, MP3,  
Vorbis, etc.) then be *very* careful. Compression like that is the  
reason TiVo has a lot of problems working with VoIP phone lines.  
However a lossless codec (FLAC, Apple Lossless) should have no  
problem. Taking that into account, you could just store all your data  
onto your iPod.


This right here, though, opens up an entirely new option that sounds  
a lot easier than anything you were planning. If the inevitable  
destination is a CD, why not just try going straight from your data  
file to a CD. That can be done all in software without any major  
problems, I'm guessing. I know there's a lot of Commodore PET/64 and  
Apple ][/][e fans out there who are probably doing the same thing  
right now (I'm guessing this is what you want to do).


But this doesn't mean you can just tack a .wav of .aiff extension to  
your data file and burn it. You have to take into account the data  
transfer speeds and all of that. Try googling around for such a  
program. It'll probably prove more useful than your complex phone  
line set-up.

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Re: Data/program storage questions

2005-12-20 Thread Ingles, Raymond

 From: Kichigai Mentat

  Can data and programs be sent via modem to microphone input and  
  recorded on a cassette or reel to reel tape recorder?

 Well, in theory... After all, the data is analog audio, *the* most  
 compatible format on the planet. But I suppose the question here is  
 why.

 I had a buddy with some DSP background try to use ordinary cassette
tapes as a backup medium. Turns out that with things like AGC (automatic
gain control), and the normal wow and flutter of a standard tape deck,
etc., the possible data rates were just too low to bother, and nowhere
near what could be done with a modem.

 I remember just trying to get my old Linux  
 desktop to act as a dial-up-to-broadband bridge, and that was  
 practically impossible.

 Funny, that shouldn't be much of a problem. Oh, well.

 Ahh, good, the hardest part right here. I suppose you'd need a whole  
 new program designed from scratch to just send raw data out through  
 the modem.

 Yeah, and the modem expects replies from the receiving end, too; it's
not just going to play the sound into a tape recorder.

 Now this sounds like the easiest thing right here. Cassette 
 to CD and using the CD to load sounds like no problem.

 Far better to skip the cassette part and just burn the data onto CD.
That way you skip a lossy digital-analog conversion out the sound
card. You're already going to have trouble reading in the audio data
(analog-digital) on the receiving end. Don't expect better than 12
bits of clean data, and realistically you can only count on 8, I'd
think. The sound recording hardware in most computers (particularly
older ones) isn't great. Data rates won't be terribly good.

 Sincerely,

 Ray Ingles  (313) 227-2317

 Science creates questions that can't always be answered. Religion
 creates answers that can't ever be questioned. - Anonymous



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Re: Data/program storage questions

2005-12-19 Thread J Worgan
Can data and programs be sent via modem to microphone input and recorded on
a cassette or reel to reel tape recorder?

Then loaded through modem input from the cassette or reel to reel tape
recorder output?

What modem output wires need to be used (or not used) or adapter to
accomplish this?

What modem input wires need to be used (or not used) or adapter to
accomplish this?

What modifications of modem software need to be made, if any?

Would it be simpler to send it via modem to a telephone and record it off
that phone?

Could it be played back over the phone and uploaded via a modem?

If any pair of the above (output and input) can be done to a tape recoder,
then could it be digitized and burned onto a CD, possibly loaded from a CD
player audio output?



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