Sometimes noted as a machine totally unto itself, the "Roland TR-909" which was introduced in 1983 is an important piece of kit that greatly influenced dance music genres like house, techno, and acid. Designed by Tadao Kikumoto and released to the world after the TR-808 (more reading on that here), it is still a much-loved rhythm machine that can be found in studios across the world. Join me in this article to explore some of its more n...