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, is an analog polyphonic synthesizer 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. 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.