sentences:  Yamaha SY77
  
  Yamaha SY77 is a 16 voice multitimbral music workstation first produced by Yamaha Corporation in 1989.The SY77 is a synthesizer whose architecture combines AFM (Advanced Frequency Modulation) synthesis, AWM2 (Advanced Wave Memory 2) for ROM-borne sample-based synthesis, and the combination of these two methods christened Realtime Convolution and Modulation Synthesis (RCM).