At New Music Gathering in Boston last month, Sound Energy revived Betsy Jolas' evanescent and ethereal "Quatuor II," giving the piece its second American performance and third recording in the piece's 50+ year history. The audio recording of the live performance of this exceptionally difficult piece can be heard below.
https://www.youtube.com/watch?v=-tshC7uO07k&feature=youtu.be
https://www.youtube.com/watch?v=-tshC7uO07k&feature=youtu.be