'AdLib' - right. As far as I can tell from Google results, that's some sort of chip sample generator, right? I'm guessing the instrument definitions only hold parameters for that, then.
It was a look at the binary data of the file that led me to think it was truncated. There was obviously no sample data, but I couldn't see much in the way of patterns either - so even if I could play it, it looks as if it would have been a very short song!
Thanks for all your help, anyway. I don't have Windows of any variety, so DOSbox is not an option.
