The answer was OSVALDO FRESEDO, congratulations to Daniel Rsi for giving the right answer !
Carlos Di Sarli is one of the most famous tango musician, and he actually began as a pianist in Osvaldo Fresedo orquestra in 1926.
Di Sarli was a big admirer of Fresedo’s work, and was strongly influenced by his style.
And that’s why he dedicated him the tango “Milonguero Viejo” :
Listen again to Fresedo’s great theme : Niebla del Riachuelo
See you next week for another quiz !