I first heard "Tanzen und Springen", an ancient German madrigal by Leo Hassler (1601), sung by the King's Singers on their LP "Die King's Singers singen deutsche Volkslieder". In Germany this song can generally be found as a standard in mixed choirs. The version I play and sing can be found in
Lieder, Songs und Gospels 3
and it is a wonderful piece for the concertina with its extremely rapid chord changes.
The song itself is a laudatio to the very joys of life, dancing, hopping, singing, chatting the young ladies up, etc., it is all in there!