The TR-909, or Roland TR-909 Rhythm Composer, is a drum machine released by Roland Corporation in 1983. It is known for its distinctive sounds, combining analog synthesis and digital samples. The TR-909 features a sequencer that allows users to create complex drum patterns, making it popular in various music genres, especially electronic dance music. Despite its initial commercial struggles, the TR-909 gained a cult following and became a staple in music production. Its iconic sounds, such as the kick drum and snare, have been used by many artists, influencing the development of genres like house and techno.