Complex sentence: The Oberheim OB-12 was an italian-made synthesizer, designed and manufactured by the Italian electronic organ maker Viscount, using Oberheim name under license from Gibson, who bought the Oberheim name after the original company went out of business.
Split into simpler sentences: The Oberheim OB-12 was an italian-made synthesizer. It was designed and manufactured by the Italian electronic organ maker Viscount, using Oberheim name under licensed from Gibson, who bought the Oberheim name after the original company went out of business.