This is the classic Roland Jupiter 6 analog synthesizer I purchased brand new about 30 years ago. Yes it is used. I loved it and used it a lot. But everything is working properly and sound awesome.This keyboard is in good working condition. Sold as is no returns accepted. Technical specifications Polyphony 6 voices Timbrality 2 Oscillator 2 VCOs per voice LFO 2, 1 in LH control section (sine) / 1 programmable, sine/triangle/sawtooth/square Synthesis type Analog Subtractive Filter 1 resonant multi-mode (lowpass/bandpass/hipass) filter Attenuator 2 ADSR Aftertouch expression No Velocity expression No Storagememory 48 tones/32 patches Effects None Input/output Keyboard 61 keys External control MIDI The Roland Jupiter-6 (JP-6) is a synthesizer manufactured by the Roland Corporation introduced in January 1983. Although introduced as a less expensive alternative to the Roland Jupiter-8, its features include some capabilities not present in the JP-8. The Jupiter-6 is widely considered a workhorse among polyphonic analog synthesizers, capable of producing a wide variety of sounds, such as ambient drones, pads, lead synthesizer lines, and techy blips and buzzes. It is renowned for its reliability and ease, but with sophisticated programmability. The JP-6 has 12 analog oscillators (2 per voice), and is bitimbral, allowing its keyboard to be "split" into two sounds - one with 4 voices, and one with the remaining 2 voices (either "Split 4/2" or "Split 2/4" mode). "Whole Mode" is also available, dedicating all 6 voices to single (monotimbral) sound across the entire keyboard. Available waveforms include sawtooth, triangle, variable width pulse, square, and noise. Unusually, the JP-6 allows simultaneous selection of any or all of the waveforms in each of its two oscillator banks, an option not found on the JP-8. Oscillator sync and cross modulation are also available. "Unison Mode" allows all 12 oscillators to be triggered simultaneously by depressing a single key. Unison Mode can also be played polyphonically, with the number of oscillators triggered by each key determined by the number of keys held down. The JP-6 was among the first electronic instruments (alongside the Roland JX-3P and the Sequential Circuits Prophet-600) to feature MIDI, then a brand new technology. Sequential CEO Dave Smith demonstrated MIDI by connecting the Prophet to a Jupiter-6 during the January, 1983 Winter NAMM Show.[1] Europa, a popular firmware upgrade available from Synthcom Systems, adds a wide array of modern enhancements to the instrument's MIDI implementation, user interface, patch memory, and most especially its arpeggiator, turning the Jupiter-6 into a contemporaneously adaptable instrument and unique composition tool. Dennis DeYoung is said to have owned six of these which where used on the Mr. Roboto album/tour.