| This great old digital synth from the D-50 & M1 era really can produce some cool sounds. It has great filters (especially if you have upgraded your K4"s ROM to 1.3 or above). To check your K4"s operating system version, hold down the System button while powering up the synth.
We have made three banks for the K4 and we sell them as one superb package.
Bank names: Analogue Classics, New Age / Pads, Xtravaganza
Each bank contains 64 new single sounds. Some use only two tones in order to preserve the 16-note polyphony of the K4s; some use all four tones rendering the K4 8-voice polyphonic but sounding great, full and amazing - still to this day. | 
