http://www.folkinfo.org/songs/abcconvert.php

It uses basically the same software as concertina.net, but I think they've reconfigured it to eliminate some of the silly defaults in the MIDI converter.

Mudcat has a bug in the way it displays preformatted text, so when I lay ABC out readably as above, it's displayed with spaces at the start of each line. This means these converter websites won't recognize a straight copy-and-paste as being ABC. Here's the ugly version you can just copy straight:

X:1
T:Waiting for the Federals
T:Seneca Square Dance
M:C|
L:1/8
Q:1/2=112
K:G
B4   B2AB|d2B2 BAG2|B4   d3B |ABAG E2D2 |
B4   B2AB|d2B2 BAG2|ABAG E2F2|G4- G2z2:|
g4   gage|d2B2 BAG2|g4   gfga|be2d e2f2 |
gaba g3e |dg2d BAG2|ABAG E2F2|G4- G2z2:|