"Hadal Zone" is also the name of an album by a fun acoustic guitar duo, Opal Ocean. Great for flamenco fans, and also those who enjoy the occasional 7/4 time si

"Hadal Zone" is also the name of an album by a fun acoustic guitar duo, Opal Ocean. Great for flamenco fans, and also those who enjoy the occasional 7/4 time signature. I found out about them at a festival in my smallish German city and they were a lovely surprise to the people around me, as well.