Digital synthesizer

A digital synthesizer is a synthesizer that uses digital signal processing (DSP) techniques to make musical sounds. This in contrast to older analog synthesizers, which produce music using analog electronics, and samplers, which play back digital recordings of acoustic, electric, or electronic instruments. Some digital synthesizers emulate analog synthesizers; others include sampling capability in addition to digital synthesis. The very earliest digital synthesis experiments were made with computers, as part of academic research into sound generation. In 1957, the first programming language for computer music, MUSIC, was developed by Max Mathews on an IBM 704 at Bell Labs in 1957. It generates digital audio waveforms through direct synthesis. Circa 1969, EMS MUSYS 3 system was developed by Peter Grogono (software), David Cockerell (hardware and interfacing) and Peter Zinovieff (system design and operation) at their London (Putney) Studio. The system ran on two mini-computers, Digital Equipment PDP-8's. These had a pair of fast D/A and A/D converters, 12,000 (12k) bytes of core memory (RAM), backed up by a hard drive of 32k and by tape storage (DecTape). The earliest digital sampling was done on that system during 1971–1972 for Harrison Birtwistle's "Chronometer" released in 1975. In 1972–1974, Dartmouth Digital Synthesizer was developed by Dartmouth College Professors Jon Appleton and Frederick J. Hooven, in association with NED co-founders Sydney A. Alonso and Cameron W. Jones. In 1977, Bell Labs Digital Synthesizer was developed by Hal Ales at Bell Labs. In 1977, New England Digital (NED) released the Synclavier, the first commercial synthesizer to use purely digital sound generation and also the world's first commercial FM synthesizer. Early commercial digital synthesizers used simple hard-wired digital circuitry to implement techniques such as additive synthesis and FM synthesis. Two other early commercial digital synthesizers were the Fairlight CMI, introduced in 1979, and the New England Digital Synclavier II, introduced in 1979 as an upgrade to the original Synclavier.