I don't have any CCE WAV files to test with.
Have you tried to use these (MS-DOS) applications for converting .BAS files into .WAV files?
http://mc-1000.wikispaces.com/Cassete#toc0Download the .zip file linked by the word "
aqui", then you can use the four applications:
BAS2BIN.EXE filename.BASFrom a plain text file containing a BASIC program, generates a filename.BIN containing all the bytes that are to be saved to tape (header, then the tokenized version of the program).
You can get a handful of BASIC programs
here.
BIN2WAV.EXE filename.BINGenerates a filename.WAV file from the .BIN file. The .WAV file generated has an
unusual sample rate of 2757 samples/second (instead of 44100 or something like that), tuned to produce .WAV files as small as possible, with
one sample per peak or valley. But the sound seems to get distorted in some players. For instance, it plays well in Windows Sound Recorder, but differently in Windows Media Player. (Higher frequency becomes mute.) Would M.E.S.S. read them well?
WAV2BIN.EXE filename.WAVAnalyzes a .WAV file to generate a .BIN file. Accepts files with any sample rate.
LISTBIN.EXE filename.BINLists the BASIC program contained in a .BIN file. It doesn't generate a .BAS file, but you can redirect (>) the output to a file.
NOTE: These applications were made with an old QuickBasic, so file names must have no more than 8 characters.