Difficulty loading real tapes in EightyOne

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damieng
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Joined: Wed May 20, 2020 6:26 am

Difficulty loading real tapes in EightyOne

Post by damieng »

Hi there.

I'm trying to archive some tapes and while I know what a Spectrum should sound like and can tweak the tone/volume right I'm struggling with the ZX81 (well, the TS1000 specifically) as I acquired these tapes from somebody else.

Can you provide a screenshot of what the WAV manager should look like when loading a good tape? I'm tweaking the two sliders but am not sure what the recording should look like relative to the red and green lines for a successful load.

Also my Tape Source > Audio In is greyed out - any idea why that might be? (I'm currently sampling in Audacity at 44.1KHz/16-bit/mono and then trying the resulting WAV file in EightyOne in TS1000 mode with the 16K pack option set).

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XavSnap
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Joined: Sat May 10, 2008 4:23 pm

Re: Difficulty loading real tapes in EightyOne

Post by XavSnap »

Hi Damieng,

Just get your sound file in a Wav file format with a sound capture tool. (the direct sound input can be corrupt by the system sound pooling)
Open the Wav input window, and select the green line (bits volume trigger) to 2/3 of the max higher harmonics volume.
Select the tape converter (tape icon), and check the file in the TZX window.
To create a 'P' file, you need to convert a single file… you had to delete all other one.

If a LOAD"" don't work, you had to use a specific tool (or host wavs files on a backup web site to allow us to fix it).

Have fun…
wav01.JPG
wav02.JPG
Xavier

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mrtinb
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Re: Difficulty loading real tapes in EightyOne

Post by mrtinb »

My greatest succes with reading bad tapes has been with the Java ZX81 Tape Converter.

It can be a little difficult to find the right default values, but you can correct any bit that is interpreted wrong.
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

stroebeljc
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Joined: Thu Apr 23, 2020 6:02 am

Re: Difficulty loading real tapes in EightyOne

Post by stroebeljc »

mrtinb wrote:
Thu May 21, 2020 1:32 pm
My greatest succes with reading bad tapes has been with the Java ZX81 Tape Converter.

It can be a little difficult to find the right default values, but you can correct any bit that is interpreted wrong.
I totally agree, Martin. This is a great tool and also is the best at generating wave files, I believe.
John

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XavSnap
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Re: Difficulty loading real tapes in EightyOne

Post by XavSnap »

"Tape Doctor" (java by Arnaud Guyon‎)
34268900_10156484962149533_2946259114499506176_o[1].jpg
https://github.com/smart-fun/TapeDoctor
Xavier

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XavSnap
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Re: Difficulty loading real tapes in EightyOne

Post by XavSnap »

Keep your smartphone away !!!
ring.jpg
Xavier

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