Saban Entertainment licensed the series in North America and produced an English-language version under the title "Digimon: Digital Monsters", which aired on Fox Kids Network between August 14, 1999 and June 24, 2000. The English version featured an original soundtrack and made changes to character names, as well as edits pertaining to certain aspects such as violence to make the series more suitable for younger audiences. Wendee Lee, Michael Sorich and David Walsh became the voice directors. The original soundtrack of the show was replaced by music composed by Udi Harpaz and Shuki Levy, which recycled several music soundtracks from ', "Princess Sissi", "Masked Rider" and "Spider-Man: The Animated Series". The opening theme for all episodes is "Digimon Theme" by Paul Gordon. "Hey Digimon" by Gordon, an insert song featured in the show, and was released on the of ' along with "Digimon Theme".