Filepaths are case sensitive on some platforms, so I would first of all double check that “audio/Tom.wav” is correct.
If the file is actually called “tom.wav” or “Tom.WAV”, some platforms will fail to find it when you specify the name as “Tom.wav”.
Otherwise, it’s possible that there is an issue with the wav file itself. It could be that it’s actually an mp3 rather than a wav file, and has just had the extension part renamed.