Sonic Spinball Unused 1-Up Jingle
If I have to make a guess, this might have been played when you score enough points for an extra life.
Within the August prototype, there are quite a few music tracks that don't exist within the final game, and some that are different. You can listen to these tracks by using the PAR codes 09D0C4:7100 09D1DE:00??.
Credit goes to the Cutting Room Floor and the others for discovering this
SEGA owns Sonic Spinball.