Chemet toured the world as a violinist for decades, playing a violin made by Giovanni Battista Guadagnini. In 1904, still a teenager, she was a soloist at the Proms concerts in London, under conductor Henry Wood. In 1907, she toured North America as a violinist with her husband, pianist Camille Decreus, in the company of Emma Calvé. During World War I, when travel was difficult, she gave benefit concerts and performed for the troops in France, and worked as a nurse's aide; she was awarded the Legion of Honour for her service.