Which piano piece is played here?

This is not an answer, but I couldn't fit it into a comment.

I transcribed the sheet music in Hint2 into ABC notation. Copy the ABC notation below and paste it into to this ABC player/editor page, and then press the play button to hear the music. I didn't recognize it myself, but maybe someone will recognize it after hearing it.

X: 1
T: Unknown Piano Piece
M: 3/4
L: 1/8
K: Db bass
V: 1
A,6-|[A, F,]6-|[D,6 F,6 D6] | [E,A,CE]6 | L[F,A,DF]2 [K: treble] b'f'a'd' | g'd'f'ae'a|d'fbfad|gdfAeA|[Fd]2 z2 z2|
V: 2 clef=bass
A,,6-|[D,,A,,D,]6 | [B,,,B,,]6 | [A,,,A,,]6 | L[D,,,D,,]2 [K: treble] d'fad |adfAfA|dFdFAD|ADFA,FA,|[K:bass]D,2 z2 z2|