[Coco] Recovering a damaged cassette file

[Arthur Flexser]

And following up on my last message:

Try doing a PCLEAR 1 before CLOADing the program, also, and see if it
will load then.  If a program runs out of memory while loading, you
will get an IO error, I think, just as you observed.  (You'd expect an
OM error, but I suspect that's not what you get.)

Art

On Wed, Sep 5, 2012 at 12:18 AM, Arthur Flexser <flexser at fiu.edu> wrote:
> Just a thought....
>
> Is it possible your program is too big to fit in memory with Disk
> Basic, and will only load under Extended Basic (no disk controller)?
>
> Art
>
> On Tue, Sep 4, 2012 at 11:59 PM, Diego Barizo <diegoba at adinet.com.uy> wrote:
>> I really don't mind that much if I can not recover the part after the drop.
>> It is at the 15 second mark of a 16 second recording. Since it is a game I
>> wrote about 20 years ago, I hope I will be able to recreate the code.
>>
>> I know that in some cases, if I reset the CoCo right before getting the IO
>> ERROR, most of the program is actually loaded, but when I try it with this
>> one, the computer freezes.
>>
>> It was probably the best game I ever wrote - or maybe is just the years
>> blinding me ;-) - and I was such an idiot as to not keeping at least 2
>> copies of it, as I always did :-(
>>
>> Diego
>>
>>
>>
>> Stephen H. Fischer wrote:
>>>
>>> Hi,
>>>
>>> The break at the beginning is no problem AFAIK having heard tapes loading
>>> so
>>> many times.
>>>
>>> Pasting a good section would not be useful.
>>>
>>> It might be possible to increase the level of the bad section but I have
>>> never tried. A FFT of the bad section would tell the tale.
>>>
>>> Making the wave form available might allow some help, but the picture does
>>> look pretty bad.
>>>
>>> Playing the tape on a high quality audio tape recorder might help, I never
>>> used a CoCo RS one having purchased a good audio one for computer usage
>>> right at the beginning. Money well spent but I never saved anything with
>>> just one copy.
>>>
>>> Cleaned and demagnetized your tape head lately? I had to get mine out just
>>> to spell demagnetized. I have two bottles of tape head cleaner.
>>>
>>> There may be an utility that could recover the last part, but if it is
>>> code
>>> that is lost, do not waste your time.
>>>
>>> If you found the wave file online perhaps there is a good copy elsewhere
>>> online.
>>>
>>> Name and location of the bad one would help in that case.
>>>
>>> SHF
>>>
>>>
>>>
>>>
>>> ----- Original Message ----- From: "Diego Barizo" <diegoba at adinet.com.uy>
>>> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>>> Sent: Tuesday, September 04, 2012 6:07 PM
>>>
>>> Subject: [Coco] Recovering a damaged cassette file
>>>
>>>
>>>> I have a program saved on tape that I would love to recover.
>>>> The problem is that the tape as a "drop" near the end of the file.
>>>> Has anyone ever been able to recover, at least partially a damaged
>>>> cassette file?
>>>>
>>>> I was thinking about just copying and pasting a good section of the file
>>>> on top of the damaged one, using Audacity ( an audio editor )
>>>>
>>>> Any suggestions on what to do?
>>>>
>>>> In case it helps, here is a screenshot of the last section of the
>>>> waveform. You can see 2 drops, a small, sharp one first, and a bigger one
>>>> almost at the end.
>>>> www.yaccs.info/MyDoD.jpg
>>>>
>>>> Thanks to all,
>>>>
>>>> Diego
>>>
>>>
>>>
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>>>
>>
>>
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