The misleading tune information in the Digital Tradition at Mudcat is due to the blending of the ASCII Digital Tradition file with the HTML of Mudcat.

I don't think so if I’m understanding you correctly and at least with the examples I’ve looked at. I think Dick used AskSam as his database and you will for example find the same A-Rovin song/tune file naming in the .ASK file (which btw is a binary although some text editors will make some sense of it) in the DOS dt download. I might also note that any differences marked in the spreadsheet can not possibly have anything to do with a Mudcat conversion or “blending”.

Anyway, maybe enough on that... I think that in getting carried away and showing where I’d found differences I have managed to obscure my main point (as well as not helping the OP – perhaps some of this stuff would be better moved elsewhere or whatever?). Sorry about that. They don’t matter anyway as long as the right name is used in links.

The point is that I have found songs with tunes that won’t play for me with the pop up player and I noticed that the links for the popup player are given the song file name rather than the tune file name. As an example, the provided https://mudcat.org/midi/player.cfm?file=AROVIN1 does not work for me but altering the url to https://mudcat.org/midi/player.cfm?file=AROVIN.1 works.

It would have been hard for him to design a workaround for those songs that did not have tunes, so that left some of the songs with inoperable links.

Oddly enough, since I started looking at this (and I’d not paid attention before – I don’t use the dt database often and, generally, when I do, prefer my private version - links won’t work outside home on that example btw), I have not found “Click To Play” links showing on songs with no tunes. I have noticed that these links when the do exist supply the tune file names in the urls. It may just be me but I can’t think of any technical reason whey the “Pop Up Player” links can’t work in the same way.