Everything seems to work very well. A few slider caps and one volume knob which are missing (which we are trying to locate) this entire unit is all original including the original cord. All of the different functions seem to work properly and all the keys strike well. The speakers seem to be functioning properly as well as all of the other waveform generator, source mixer, ring modulator, tone oscillators and all the other bells and whistles of this vintage synthesizer. You can definitely create any of those Star Wars and 70’s sounds you want to with this one.