[Coladam] Turning tapes into DDPs (Frances and/or Richard Clee)

Joe Blenkle - Comcast jblenkle at comcast.net
Tue Nov 6 18:38:46 CET 2012

My 2 cents...I have successfully made ddp's on many occassions. But as has 
been stated previously, they are not the same quality as the Coleco/Loren 
made ones.

Going from memory as to the original question:
1. There is no way around using a drill to drill holes in the tape. I 
suppose you could use a soldering iron of the proper size to melt holes, but 
the drill method is much easier.
2. I don't believe anyone has ever tried recoring the tape to a computer 
file and then recording it back to an audio cassette. It might work, but...
3. It is crucial to record both sides of the tape exactly in sync. There is 
no way around this. You must play/record one side, flip the tapes over at 
exactly the same point, and play/record the second side. If the tracks on 
opposite sides of the tape are off, the tape probably won't work. I have had 
several instances where I made tapes with the tracks slightly out of sync 
and it resulted in the data drive doing a lot of winding back and forth 
trying to find the corresponding block on the other side of the tape.

----- Original Message ----- 
From: "Rob Bairos" <rbairos at gmail.com>
To: <coladam at adamcon.org>
Sent: Tuesday, November 06, 2012 4:36 AM
Subject: Re: [Coladam] Turning tapes into DDPs (Frances and/or Richard Clee)

> Finally, is it possible to make a DDP backup via a single-cassette tape
>> deck by doing the following:
>>From my understanding, the tapes use both left and right audio track
> simultaneously, so it would be extremely difficult to record both sides
> individually and keep them in sync.  I think my brother and I tried
> recording one side, then the other without success.   At the time, rumour
> had it that it was possible with a tape recorder that recorded both sides
> simultaneously.
> That being said, would it be possible to make an audio recording of each
> side, and use regular software based signal processing to extract the 
> data?
> Syncing would not be an issue as the software could examine both left and
> right wav files individually?
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