Most of the tracks in Super Volleyball are jingles which are not supposed to loop. Except for Menu, Match Won, Match Lost and Championship Winner, they play only once ingame. I suppose you recorded them from the HES rip? For the loopless versions, you should use the game sound test instead.
Unknown Track 1 = Championship Winner
Unknown Track 2 = World Cup Winner (arcade, not sure on PCE)
Unknown Track 3 = ?
Unknown Track 4 = Set Won
Unknown Track 5 = Set Lost
Unknown Track 6 = Lost Point
VB edit: Fixes were incorporated into the pack in the OP.