Creating Tape Image files (CDT) - Revision history

FindYWay: Mention wav2tzx

2025-09-08T20:41:08Z

Mention wav2tzx

← Older revision		Revision as of 20:41, 8 September 2025
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	Consider https://github.com/stripwax/wav2tzx		Consider https://github.com/stripwax/wav2tzx

	Very ~~tersely~~.		It can work with audio from fully standard, some semi-standard and maybe some protected tape.

			Written with ZX Spectrum in mind but specifically capable of CDT format.

			Very terse indications below.

	Get and compile:		Get and compile:

			<pre>
	git clone https://github.com/stripwax/wav2tzx		git clone https://github.com/stripwax/wav2tzx
	cd wav2tzx/src		cd wav2tzx/src
	gcc -o wav2tzx wav2tzx.c		gcc -o wav2tzx wav2tzx.c
			</pre>

	Use:		Use:

			<pre>
	./wav2tzx -cpc /some/path/to/my.wav my.cdt		./wav2tzx -cpc /some/path/to/my.wav my.cdt
			</pre>

	== CSW ==		== CSW ==

FindYWay: Mention wav2tzx.

2025-09-08T20:38:42Z

Mention wav2tzx.

← Older revision		Revision as of 20:38, 8 September 2025
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	[[Category:DATA Storage\|*]][[Category:Cpctech.org]]		[[Category:DATA Storage\|*]][[Category:Cpctech.org]]

			== wav2tzx ==

			Consider https://github.com/stripwax/wav2tzx

			Very tersely.

			Get and compile:

			git clone https://github.com/stripwax/wav2tzx
			cd wav2tzx/src
			gcc -o wav2tzx wav2tzx.c

			Use:

			./wav2tzx -cpc /some/path/to/my.wav my.cdt

			== CSW ==

	<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].'''''</center></div>		<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].'''''</center></div>

MacDeath at 12:46, 5 January 2011

2011-01-05T12:46:09Z

← Older revision		Revision as of 12:46, 5 January 2011
Line 1:		Line 1:
	[[Category:DATA Storage]]		[[Category:DATA Storage\|*]][[Category:Cpctech.org]]

	<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].'''''</center></div>		<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].'''''</center></div>

MacDeath at 01:46, 17 December 2010

2010-12-17T01:46:27Z

← Older revision		Revision as of 01:46, 17 December 2010
Line 1:		Line 1:
			[[Category:DATA Storage]]

	<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].'''''</center></div>		<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].'''''</center></div>

Gryzor: How I Make Amstrad CDTs moved to Creating Tape Image files (CDT): More 'correct' title

2009-01-20T09:49:53Z

How I Make Amstrad CDTs moved to Creating Tape Image files (CDT): More 'correct' title

← Older revision	Revision as of 09:49, 20 January 2009
(No difference)

Octoate: credits to Kevin Thacker

2009-01-17T22:11:37Z

credits to Kevin Thacker

← Older revision		Revision as of 22:11, 17 January 2009
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	'''~~How I Make Amstrad CDTs~~'''		<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].'''''</center></div>

	CSW -r -s45454 -k tape		CSW -r -s45454 -k tape

Octoate: Upload with OpenOffice

2009-01-17T22:10:20Z

Upload with OpenOffice

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'''How I Make Amstrad CDTs'''

CSW -r -s45454 -k tape

(.csw is automatically appended)

Set volume so that the green VU meter is half way across the screen and make sure there is no clipping, which is displayed on the second red VU meter.

Now that you've established your volume settings, you need to rewind the tape to the beginning. Press a key so that sampling begins. Wait until the end of the tape and press a key to stop sampling. A CSW & WAV file will have been created.

Decompress the CSW to a VOC file and try to decode it, using the command:

CSW -d filename

(file extension is not required as CSW assumes .csw) ,P.Try and decode the VOC with the following command line syntax:

VOC2TZX /cpc /pilot 1024 /maxp 20 filename.voc

See if you get all the blocks to decode; on standard tapes you will get a header followed by a data block, so you should get pairs displayed. This is not always the case with tapes that use non-standard loading schemes.

If you don't get this and there are a number of blocks but no pattern try altering the values for /pilot (1024 - 2048) and /maxp (20 - 35). With luck this proceedure should yeild better results and you will become a master of decoding.

Once you get the tape to decode and the blocks look good, you can omit the /cpc switch to get a TZX. Rename this .TZX to .CDT. I'm not sure why it's bad to use /cpc, but I think it's something to do with assumptions which are untrue (timings etc).

If you have no luck than you can try the proceedure again using the WAV file. As VOC2TZX currently doesn't handle CSW or WAV you have to convert it, but this could be to our advantage. I've found that many of my troublesome tapes convert if you apply a filter to the WAV->CSW->VOC. To do this just use the following: "CSW -fr1 filename.wav", you could also use other filter like -fl600. There are other filters available but I've not used them so far.

If all else fails then send the tape to me and I'll have a go at them :-)