Are there any surviving hymns from the Valdensian movement? The Valdensians preached and celebrated the Lord's Supper in the native tongue of the people, not in Latin. However, every source I've read about their customs focus on what was spoken, while I also want to know what they sang.

Do we have any sources that describe their songs, when and how they were sung or indeed if they did sing during their worship services at all?

Of course this question is about the oldest era of the Valdensian movement, way before it merged with Calvinistic Protestantism.
I contacted the Valdensian Seminary in Rome and got this reply, from Lothar Vogel, professor of Church History:


  Dear Mr. Gunther,
  
  I thank you very much for your kind request and for your interest in
  Waldensian history.
  
  I can tell you that there are no sources concerning medieval
  Waldensian hymns or liturgies linked to Eucharistiv celebrations. At
  the latest from 14th century on the liturgical pratise was factually
  limited to confession, and the Waldensians participated at the
  sacramental practice of the "great church" (baptism, eucharist).


The answer is, thus, "no".