Yamaha GX-1

Yamaha GX-1
Yamaha GX-1
	Yamaha GX-1
Manufacturer	Yamaha
Dates	1973/1975 - 1977
Price	$60,000
Technical specifications
Polyphony	18 voices totally: 2 x polyphonic sections; with 8 note dual-osc polyphony per section; Solo section single-osc monophonic; Pedal section with triple-osc monophonic;
Timbrality	4
Oscillator	Upper and Lower poly sections - 2 per voice; ; Solo section - 1; Pedal section - 3;
LFO	3
Synthesis type	Analog Subtractive
Filter	voltage controlled 2-pole low-pass and high-pass filters per oscillator; ; static band-pass and high-pass filters on sawtooth and square waves only;
Attenuator	2 envelope generators
Effects	2 x spring reverb
Input/output
Keyboard	1 x 61-key, horizontal aftertouch; ; 1 x 61 key; 37-key, velocity, vertical and horizontal aftertouch; 25 pedals;
External control	None

The Yamaha GX-1, first released as Electone GX-707,^[a]^[3] is an analog polyphonic synthesizer organ developed by Yamaha as a test bed for later consumer synths and Electone series organs for stage and home use. The GX-1 has four synthesizer "ranks" or three manuals, called Solo, Upper, and Lower, plus Pedal, and an analog rhythm machine.^[2] The GX-707 first appeared in 1973 as a "theatre model" for use on concert stages, before the GX-1 was publicly released in 1975.^[1]

^ ^a ^b "[Chapter 1] Origins of the Yamaha Synthesizer". History, Yamaha Synth 40th Anniversary. Yamaha Corporation. 2014. Archived from the original on 2015-07-11. ... Introduced in 1975, the GX-1 was ...", "Why digital technology in an analog synth? ... It was thus clear that new control technology would be required in order to use a limited number of circuits in a more effective manner. ... This type of device was known as a key assigner, and it can rightly be called the predecessor of today's dynamic voice allocation (DVA) technology. Back in the early seventies, when tone generators still relied on analog technology, digital circuitry was already being put to use in these key assigners.", "In 1973, Yamaha completed development work on a prototype codenamed the GX-707. Based on cluster voltage control, this instrument could be regarded as the predecessor of the Electone GX-1. ... As the flagship model in the Electone lineup, however, this prototype was conceived of as a theatre model for use on the concert stage. With a console weighing in excess of 300 kg and a separate board required for editing tones, it was not well suited for sale to the general public, and to this day is still considered a niche instrument.
^ ^a ^b ^c ^d Yamaha GX-1 Owner's Manual 1974, p. 24, Specifications
^ "Yamaha Electone GX-1". www.imoose.nl. Retrieved 2020-08-03.

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[Yamaha2014-1] "[Chapter 1] Origins of the Yamaha Synthesizer". History, Yamaha Synth 40th Anniversary. Yamaha Corporation. 2014. Archived from the original on 2015-07-11. ... Introduced in 1975, the GX-1 was ...", "Why digital technology in an analog synth? ... It was thus clear that new control technology would be required in order to use a limited number of circuits in a more effective manner. ... This type of device was known as a key assigner, and it can rightly be called the predecessor of today's dynamic voice allocation (DVA) technology. Back in the early seventies, when tone generators still relied on analog technology, digital circuitry was already being put to use in these key assigners.", "In 1973, Yamaha completed development work on a prototype codenamed the GX-707. Based on cluster voltage control, this instrument could be regarded as the predecessor of the Electone GX-1. ... As the flagship model in the Electone lineup, however, this prototype was conceived of as a theatre model for use on the concert stage. With a console weighing in excess of 300 kg and a separate board required for editing tones, it was not well suited for sale to the general public, and to this day is still considered a niche instrument.

[spec-2] Yamaha GX-1 Owner's Manual 1974, p. 24, Specifications

[4] "Yamaha Electone GX-1". www.imoose.nl. Retrieved 2020-08-03.

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