The wav2cas programs around don't know the Model T format, I guess. I guess it's possible that all TRS-80s use the same format, but I wouldn't assume it.
If you managed to decode the WAV file, what you have is a "tokenized BASIC" program. You need to detokenize it, that is, convert it to ASCII or load it into the M10 as is using a binary transfer utility and then the M10 can list it (or run it). DETOKE.EXE is exactly what you need, but I don't know who has it. I didn't see it in the Personal Libraries. Can anyone share please? -- John.
