In 2015 Mary Freiburghaus met the argentinian tango singer Sandra Rehder who is considered as one of the most important voices of the current musical panorama. She represents the tango of today's women, with strong interpretations and exceptionnal quality.
In february 2016 they performed for the first time in Fribourg, Olten and Bern. After the success of this experience they decided to start a new collaboration and working together betwenn Spain and Switzerland.
The duo presents now a programm that includes classics of the argentinian tango - with compositions of Carlos Gardel, Homero Manzi, Enrique Cadicamo, Eladia Blazquez and Astor Piazzolla - and with new compositions creatided with poems of Sandra Rehder and music of Mary Freiburghaus,