The call for witnesses is still online on social networks.
The double bassist of the Orchester de chambre de Lausanne, Marc-Antoine Bonanomi, was robbed on 3 December.
Passing through France for a series of concerts, the musician noticed on his return from a sports session that his papers and his instrument had been stolen... The artistic director of the Orchestra, Renaud Capuçon, broadcast a call for witnesses on social networks to try to find the missing instrument.
The orchestra performed in concert in Aix-en-Provence.
The solo bassist and professor at the Haute École de Musique de Lausanne, Marc-Antoine Bonanomi, was invited to give a "masterclass" alongside another bassist.
The musician declared the theft at midday.
Returning from a jog in Tholonet, near Aix-en-Provence, the musician found his car fractured.
To ensure his concert the same evening, the sexagenarian had to play on a double bass lent by the orchestra.
In his tweet, the artistic director of the formation, Renaud Capuçon, specifies that the musician can be reached by telephone, in case witnesses find the instrument.
The musician filed a complaint on his return to Lausanne on Wednesday December 6.
The orchestra gave two concerts there with pianist Martha Argerich.