Some Orchestron models included sequencers and synthesizers. Turntables, sequencers and samplers are sometimes included. "Signals" demonstrates the group continuing with the use of synthesizers, sequencers, and other electronic instrumentation. Poe began experimenting with musical samplers and sequencers as a teenager. Workstation keyboards have their own proprietary built-in MIDI sequencers. SMFs are created as an export format of software sequencers or hardware workstations. For me it's just messing around with a lot of analogue sequencers and drum machines. Finite-state machines can be subdivided into acceptors, classifiers, transducers and sequencers. Music sequencers use the bpm system to denote tempo. Moog was also influenced by the sequencers of Raymond Scott. I think that 'feel' has been lost with MIDI sequencers. Arpeggiators are also commonly found in software sequencers. However, Phred was only partially adapted to the capillary DNA sequencers that became popular later. This more closely resembled working principles of hardware sequencers of the 1970s and 1980s. The ddNTPs may be radioactively or fluorescently labelled for detection in DNA sequencers.