Techno is a genre of electronic dance music (EDM) which is generally produced for use in a continuous DJ set, with tempo often varying between 120 and 150 beats per minute (bpm). The central rhythm is typically in common time (4/4) and often characterized by a repetitive four on the floor beat. Artists may use electronic instruments such as drum machines, sequencers, and synthesizers, as well as digital audio workstations. Drum machines from the 1980s such as Roland's TR-808 and TR-909 are highly prized, and software emulations of such retro instruments are popular.
Much of the instrumentation in techno emphasizes the role of rhythm over other musical parameters. Techno tracks mainly progress over manipulation of timbral characteristics of synthesizer presets and, unlike forms of EDM that tend to be produced with synthesizer keyboards, techno does not always strictly adhere to the harmonic practice of Western music and such structures are often ignored in favor of timbral manipulation