Published on Oct 28, 2014 FinlAndean Pletórico
"The Roland GR-500 was the first guitar synthesizer to be manufactured by the Roland Corporation.
The synthesizer module included Polyensemble, Bass, Solo Synth, and External synthesizer control. Much of the voltage-controller filter and voltage controlled amplifier sections were based on previous analog mono-synths from Roland. There are a number of sliders to adjust the VCO, VCF, VCA, and LFO sections but no memory to store your edits.
The synth module is controlled by a highly modified guitar. The GS-500 guitar controller was built in a partnership between Roland and the large Japanese guitar builder Fujigen. The result was the Fuji Roland Corporation, established in 1977 through a joint capital investment. Because Fujigen was also the builder of Ibanez guitars during this period, the GS-500 and subsequent 24-pin Roland guitars have been described as being manufactured by Ibanez but this is incorrect.
The GS-500 controller used a special pickup system that connected to the synth module via Roland's own 24-pin interface. Controls on the guitar primarily were for adjusting the relative volume of the different sections: guitar, polyensemble, bass, solo section and external synth. The GS-500 guitar does not have a standard 1/4" guitar output and cannot be used without the GR-500 synthesizer module. The GR-500 has a simple-but-effective infinite sustain system. The frets in the GR-500 are connected to its electrical ground. When a player fretted a string, an electric current passed through the string. The electric signal passing through the string is a greatly-amplified version of the string signal detected by the divided hexaphonic pickup. Large magnets replaced the traditional "neck" pickup. As a result of Fleming's Law, the alternating electric current in the string passing through the strong magnetic field caused the string to vibrate and create a feedback loop and infinite sustain. The GS-500 used a bridge with plastic saddles to electrically isolate each string.
Here is a brief description of each section:
"AXON NGC77 GUITAR AND BASS SYNTH WITH YAMAHA DB-50XG SOUND MODULE. it is been in my closet for over 15 years comes with pickup and cords, I basically used it as Yamaha sound module,
