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Robert "Bob" Yannes (born 1957) is an American electronic engineer who designed the SID audio generator chip for the Commodore 64 and co-founded digital synthesizer company Ensoniq. He designed the Ensoniq 5503 Digital Oscillator Chip (DOC) which was used in both commercial synthesizers and the Apple IIGS home computer.
Robert Yannes graduated from Villanova University in 1978. He started out as an electronic music hobbyist before being hired as a chip designer at MOS Technology which had become a part of Commodore. Al Charpentier recruited Yannes partly for his music synthesis knowledge. [1] He has been infatuated by electronic music since the early 1970s. He claims the song Lucky Man by Emerson, Lake & Palmer influenced him more than any other single song, and also lists Kraftwerk and Mike Oldfield among his influences. [2]
He designed the MicroPET with help from Al Charpentier which became an unintended prototype for the VIC-20 home computer.
He designed the single-chip sound synthesizer voice chip SID (6581) with enough resolution to produce high-quality music. However, he was unable to refine the signal-to-noise ratio which he desired. He hoped the chip would find its way into polyphonic/polytimbral synthesizers. The SID chip was his first attempt at a phase-accumulating oscillator, the heart of all Wavetable-lookup synthesis.
After he left MOS Technology he co-founded Ensoniq in 1982. The Ensoniq sound chips had multiplexed oscillators designed in such a way that it was possible to produce more voices per chip, typically 32 for Ensoniq's DOC, OTIS, and OTTO sound chips (48 for the final OTTO-48). Given less time constraints than for the SID chip design, a proper MOS op-amp could be implemented to eliminate signal leakage and an improved filter to achieve high resonance. Current[ when? ] designs include waveform interpolation, digital filters, and digital effects. [1]
The Commodore 64, also known as the C64, is an 8-bit home computer introduced in January 1982 by Commodore International. It has been listed in the Guinness World Records as the highest-selling single computer model of all time, with independent estimates placing the number sold between 12.5 and 17 million units. Volume production started in early 1982, marketing in August for US$595. Preceded by the VIC-20 and Commodore PET, the C64 took its name from its 64 kilobytes(65,536 bytes) of RAM. With support for multicolor sprites and a custom chip for waveform generation, the C64 could create superior visuals and audio compared to systems without such custom hardware.
An electronic musical instrument or electrophone is a musical instrument that produces sound using electronic circuitry. Such an instrument sounds by outputting an electrical, electronic or digital audio signal that ultimately is plugged into a power amplifier which drives a loudspeaker, creating the sound heard by the performer and listener.
Subtractive synthesis is a method of sound synthesis in which partials of an audio signal are attenuated by a filter to alter the timbre of the sound. While subtractive synthesis can be applied to any source audio signal, the sound most commonly associated with the technique is that of analog synthesizers of the 1960s and 1970s, in which the harmonics of simple waveforms such as sawtooth, pulse or square waves are attenuated with a voltage-controlled resonant low-pass filter. Many digital, virtual analog and software synthesizers use subtractive synthesis, sometimes in conjunction with other methods of sound synthesis.
Digital music technology encompasses digital instruments, computers, electronic effects units, software, or digital audio equipment by a performer, composer, sound engineer, DJ, or record producer to produce, perform or record music. The term refers to electronic devices, instruments, computer hardware, and software used in performance, playback, recording, composition, mixing, analysis, and editing of music.
An analogsynthesizer is a synthesizer that uses analog circuits and analog signals to generate sound electronically.
Wavetable synthesis is a sound synthesis technique used to create quasi-periodic waveforms often used in the production of musical tones or notes.
The MOS Technology 6581/8580 SID is the built-in programmable sound generator chip of the Commodore CBM-II, Commodore 64, Commodore 128, and MAX Machine home computers.
The Ensoniq Mirage is one of the earliest affordable sampler-synths, introduced in 1984 as Ensoniq's first product. Introduced at a list price of $1,695 with features previously only found on more expensive samplers like the Fairlight CMI, the Mirage sold nearly 8,000 units in its first year - more than the combined unit sales of all other samplers at that time.
Ensoniq Corp. was an American electronics manufacturer, best known throughout the mid-1980s and 1990s for its musical instruments, principally samplers and synthesizers.
The Elektron SidStation is a musical synthesizer sound module, built around the MOS Technology SID mixed-mode synthesizer chip originally used in the Commodore 64 home computer. It was produced by the Swedish synthesizer company Elektron, and was introduced in 1999. As the SID chip had not been manufactured for years, Elektron allegedly bought up nearly all the remaining stock.
A rompler is an electronic musical instrument that plays pre-fabricated sounds based on audio samples. The term rompler is a blend of the terms ROM and sampler. In contrast to samplers, romplers do not record audio. Both may have additional sound editing features, such as layering several waveforms and modulation with ADSR envelopes, filters and LFOs.
Ensoniq ESQ-1 is a 61-key, velocity sensitive, eight-note polyphonic and multitimbral synthesizer released by Ensoniq in 1985. It was marketed as a "digital wave synthesizer" but was an early Music Workstation. Although its voice generation is typically subtractive in much the same fashion as most analog synthesizers that preceded it, its oscillators are neither voltage nor "digitally controlled", but true digital oscillators, provided by a custom Ensoniq wavetable chip. The signal path includes analog resonant low-pass filters and an analog amplifier.
Elektron is a Swedish developer and manufacturer of musical instruments founded in 1998, as well as having its headquarters, R&D and production in Gothenburg, Sweden. They produce mainly electronic musical instruments, but have also made effects units and software. Since 2012, there have been branch offices in Los Angeles and in Tokyo.
The Ensoniq ES-5506 "OTTO" is a chip used in implementations of sample-based synthesis. Musical instruments and IBM PC compatible sound cards were the most popular applications.
Palm Products GmbH was a manufacturer of audio synthesizers. Founded and owned by Wolfgang Palm, PPG was located in Hamburg, Germany and, for 12 years from around 1975 to 1987, manufactured an acclaimed and eclectic range of electronic musical instruments, all designed by Palm.
The Elektron Monomachine is a synthesizer and music sequencer by Elektron. The Monomachine was available as SFX-60 model, which is a desktop sound module, and was available as the SFX-6 model, which has a keyboard and a joystick controller. During the last quarter of 2007 Elektron released the SFX-60 MkII, which is a revision providing higher signal-to-noise ratio, a slimmer design and the ability to add user waveforms, introduced with OS 1.20 in July 2008.
The Korg DSS-1 is a 12-bit polyphonic sampling synthesizer released in September 1986. It came out at a time when many of the popular synthesizer companies were beginning to get into sampling, an area of sound design that had previously been left to a handful of fledgling companies such as Fairlight, E-mu, and Ensoniq. Like Yamaha and Casio, however, Korg did not stay long in the sampling arena. The DSS-1 was the company's only sampler until 1998 when Korg introduced sampling options on their Triton and Trinity series of workstations, and on their Electribe series of drum-and-phrase samplers.
Wolfgang Palm is a German musician and inventor who was the founder and owner of Palm Products GmbH (PPG) and the inventor and creator of various pioneering technical designs for analog and digital synthesizers. He is widely acknowledged as the father of digital synthesis and as a trendsetter in the use of computer technology in the making of electronic music.
A synthesizer 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. These sounds may be altered by components such as filters, which cut or boost frequencies; envelopes, which control articulation, or how notes begin and end; and low-frequency oscillators, which modulate parameters such as pitch, volume, or filter characteristics affecting timbre. Synthesizers are typically played with keyboards or controlled by sequencers, software or other instruments and may be synchronized to other equipment via MIDI.
A sound chip is an integrated circuit (chip) designed to produce audio signals through digital, analog or mixed-mode electronics. Sound chips are typically fabricated on metal–oxide–semiconductor (MOS) mixed-signal chips that process audio signals. They normally contain audio components such as oscillators, envelope controllers, samplers, filters, amplifiers, and envelope generators.
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