Roland EP-10 61-Key Vintage Electronic PianoRoland EP 10 61 Key Vintage Electronic Piano Released in 1975, the EP 10 was Rolands first all electronic, oscillation based combo piano. In this era, oscillation of the tone bar and lead with electricity was the mainstream in electronic piano technology, and the introduction of the all electronic, oscillation based piano engine was a big leap forward. Although simple, the EP 10 has a sweet selection of oscillator sounds which can be combo'd up by