Listen to Studies: Study No. 9 online. Studies: Study No. 9 is an English language song and is sung by Kostas Grigoreas. Studies: Study No. 9, from the album Music for the Guitar: Kostas Grigoreas Plays Kyriakos Tzortzinakis, was released in the year 2004. The duration of the song is 1:38. Download English songs online from JioSaavn.