Horacio Quintana (1920-2007) joined Demare's orchestra in 1944 to fill in after Berón's departure and sang until Demare disbanded his orchestra in 1945.
Demare-Quintana repertoire is great for dancing with soft beat and beautiful melody.
Many songs are hit songs also recorded by other duplas, compare them!
Read his biography on todotango

Discography (chronological order)

1944

Están Sonando Las Ocho (The Clock Strikes Eight) 

Solamente Ella (Only Her)

Corazón, No Le Digas A Nadie (Heart, Don’t Tell Anyone)

Torrente (Flood)
Music: Hugo Gutiérrez Lyrics: Homero Manzi Translation: Derrick Del Pilar 

El Aguacero (Canción de la Pampa) (Rainstorm)

1945

Igual Que Un Bandoneón (Just Like A Bandoneon)

Lo Mismo Que Un Tango (Just Like A Tango)

Me Quedé Mirándola (I Just Stood There Watching Her)

Music: Vicente Spina Lyrics: Roberto Miró Translation: Derrick Del Pilar 

Nos Encontramos Al Pasar (We Met Passing By)