I was introduced to a new to me genre.  My Dear Son IV, Roy, gave me the gift of awareness of KLINGON OPERA.
According to RVRGEEK,  “‘u’ (meaning Universe in Klingon) is part of the first full length Klingon opera performed on earth.
“Klingon opera is based around the principle of musical combat, the impact of two opposing forces.”

For your listening … entertainment:

Klingon Opera ‘u’ in Haus der Kulturen der Welt Berlin
5min. 30sec.

uploaded by Drongo
Komposition: Eef van Breen
Libretto: Kees Ligtelijn and Marc Okrand
Künstlerische Leitung: Floris Schönfeld
Produktion: Theater Zeebelt/ Den Haag
“Part of the very special opera ‘u’ by Floris Schönfeld, directly from the Netherlands.
They tell us the story of Kahless and how he lost his brother and father to the underworld, only to follow and rescue them.
“Here we see Kahless (the wonderful Taru Huotari) fighting together with his love Lukara (Jeannette Huizinga). After the Master of the Scream (Michael Mason) tells us more about the battle at the river, Kotar from the Underworld (Ben Kropp) is looking for the two stolen souls (father and brother of Kahless) and will be convinced by Kahless to join the battle against Molor.
“Saw it in the 2013 special “Unmenschliche Musik” at the Haus der Kulturen der Welt in Berlin.” http://www.hkw.de    Drongo