A great number of the players were not at the level that Tango was beginning to demand from them at the end of the 1930s.

This was, precisely, the historical opportunity that allowed Kaplún to reach the hall of fame as the initiator of the violin virtuosity in Tango.

Kaplún played solo passages with such difficulties that demanded the best of his great interpretative dexterity.

Besides his violin playing, Raúl Kaplún contributed to Tango with great compositions.