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Chipset (OPS operator chip, EGS envelope generator chip) [34] [59] [60] Yamaha YM2151 (a.k.a. OPM) 1983 32 8 4 Mid-1980s to mid-1990s arcade systems (the most prolific FM chip used in arcades), Sharp X1 and X68000 computers, MSX (CX5M, Yamaha SFG-01 and SFG-05 FM Sound Synthesizer Unit), Yamaha digital synthesizers (DX21, DX27, DX100)
The following quotation summarizes its facilities: [T]he SN76477 generates complex audio signal waveforms by combining the outputs of a low frequency oscillator, variable frequency (voltage controlled) oscillator (VCO) and noise source, modulating the resulting composite signal with a selected envelope and, finally, adjusting the signal's attack and decay periods.
A synthesizer (also synthesiser [1] or synth) is an electronic musical instrument that generates audio signals. Synthesizers typically create sounds by generating waveforms through methods including subtractive synthesis , additive synthesis and frequency modulation synthesis .
Schematic diagram of additive synthesis. The inputs to the oscillators are frequencies and amplitudes .. Harmonic additive synthesis is closely related to the concept of a Fourier series which is a way of expressing a periodic function as the sum of sinusoidal functions with frequencies equal to integer multiples of a common fundamental frequency.
A DDS function generator. Direct digital synthesis ( DDS ) is a method employed by frequency synthesizers used for creating arbitrary waveforms from a single, fixed-frequency reference clock. DDS is used in applications such as signal generation , local oscillators in communication systems, function generators , mixers, modulators , [ 1 ] sound ...
RCA Mark II Sound Synthesizer by Herbert Belar and Harry Olson at RCA, a room-filling device built in 1957 for half a million dollars. Included a 4-polyphony synth with 12 oscillators, a sequencer fed with wide paper tape, with output recorded by a disc cutting lathe. Siemens Synthesizer (1959) at Siemens-Studio für elektronische Musik [1] [2]
The envelope generator became a standard feature of synthesizers. [ 1 ] Following discussions with the engineer and composer Vladimir Ussachevsky , the head of the Columbia-Princeton Electronic Music Center , in 1965, Moog developed a new envelope module whose functions were described in f T1 (attack time), T2 (initial decay time), ESUS ...
The Realistic Concertmate MG-1 is an analog synthesizer co-developed by Tandy and Moog Music as a basic, low-priced synthesizer to be sold by Radio Shack under their "Realistic" brand. With estimated unit sales of 23,000 from 1982 to 1983, the MG-1 became the best-selling synthesizer ever manufactured by Moog Music, [ 2 ] and is one of the most ...