The music of the video game Final Fantasy IV was composed by regular series composer Nobuo Uematsu. The Final Fantasy IV Original Sound Version, a compilation of almost all of the music in the game, was released by Square Co./NTT Publishing, and subsequently re-released by NTT Publishing. It was released in North America by Tokyopop as Final Fantasy IV Official Soundtrack: Music from Final Fantasy Chronicles, with one additional track. It has since been re-released multiple times with slight changes as part of the Final Fantasy Finest Box and as Final Fantasy IV DS OST. An arranged album entitled Final Fantasy IV Celtic Moon, containing a selection of musical tracks from the game performed in the style of Celtic music by Máire Breatnach, was released by Square and later re-released by NTT Publishing. Additionally, a collection of piano arrangements composed by Nobuo Uematsu and played by Toshiyuki Mori titled Piano Collections Final Fantasy IV was released by NTT Publishing. The music was overall well received; reviewers have praised the quality of the original composition despite the limitations of the medium, and reacted favorably to the arranged soundtracks. Several tracks, especially "Theme of Love", remain popular today, and have been performed numerous times in orchestral concert series, as well as being published in arranged and compilation albums by Square as well as outside groups. Concept and creation Uematsu has noted that the process of composing was excruciating, involving trial and error and requiring the sound staff to spend several nights in sleeping bags at Square Co. headquarters. He blamed much of the problem on the fact that this was his first soundtrack to use the new Super Famicom hardware, as opposed to his previous soundtracks composed for the Famicom. The liner notes for the Final Fantasy IV OSV album were humorously signed as being written at 1:30 AM "in the office, naturally." Uematsu has stated that, beginning with the soundtrack to Final Fantasy IV, he started to move away from the idea that the soundtrack had to be solely an orchestral score. In June 2007, Square Enix held a casting for a vocalist to sing a version of Final Fantasy IV'''s "Theme of Love" rearranged by Nobuo Uematsu. Megumi Ida was selected from approximately 800 applicants to perform the song, which was featured on the Japanese Nintendo DS remake of the game, as well as the accompanying soundtrack album. Albums Final