As of Wednesday 16 July 2014, Graindelavoix will develop a sound installation for Undertones in the crypt of the Basilica of St. Servatius. The Graindelavoix music collective was formed by Björn Schmelzer in 2000. The company performs worldwide and is renowned for its interpretations of European musical traditions. From 16 July to 23 July, this exceptional company touches down in Maastricht. They will work on a new composition in The Basilica of St. Servatius, based on the oldest office chants from the Netherlands, which are dedicated to Saint Servatius.