At the release of their first album In and Out of Focus (1970), Focus comprised keyboardist and flautist Thijs van Leer, guitarist Jan Akkerman, bassist Martin Dresden, and drummer Hans Cleuver. The album was little noticed outside the Netherlands, where a small but avid fan base developed. Akkerman left the group to form another band with bassist Cyril Havermans and Pierre van der Linden, a drummer he had previously performed with in Johnny and the Cellar Rockers, The Hunters, and Brainbox. When Cleuver and Dresden left Focus shortly after, Van Leer joined Akkerman, Van der Linden, and Havermans as the new lineup of Focus.
In 1971, the group released Moving Waves, which brought the band international acclaim and a hit on both sides of the Atlantic with the radio edit of the rock rondo “Hocus Pocus”. This rock classic consists of Akkerman’s guitar chord sequence used as a recurring theme, with quirky and energetic interludes that include alto flute riffs, accordion, guitar, and drum solos, whistling, nonsensical vocals, falsetto singing, and yodeling. This album established Thijs van Leer and Akkerman as composers who could appeal to progressive-rock album listeners (a large audience in the early 1970s) and radio single buyers.
Shortly before the band went on tour to support the album, Havermans quit and was replaced by Bert Ruiter. He released a solo album, Cyril, in 1973, on which he was backed by all three of his former bandmates from Focus.
- Audio from the 1971 album, Moving Waves: