"Let Ring" does not work at all with the Muse Sounds - and does not sustain more than approx 1 second with the MS basic sounds

Create a sequence of notes, select the notes, add a let ring (Lines palette) to the notes.
The notes are extended, but not for very long. Each note is allowed to ring for a short time, but then stopped.
By the end of the let ring line, you only hear the last note ringing, all the others have stopped.

This is problematic when writing guitar parts that call for open strings to ring on through a sequence.