- ... that, while the standard guitar-tuning E-A-D-G-B-E includes one major third amid four perfect fourths (illustrated), the augmented-fourths tuning B-F-B-F-B-F has only tritone intervals?
- ... that Kate Nash paid for her 2013 album Girl Talk through crowd funding?
- ... that Kostas Tournas' 1972 progressive-psychedelic rock opera Aperanta Horafia is considered a landmark of Greek rock?
- ... that in the first version of the chamber opera In the Penal Colony, based on the short story by Franz Kafka, composer Philip Glass included the character of Kafka as narrator?