/  <  Computer  <  Platform  <  PC, IBM compatible  <  Sound and Music  <  Creative Labs  <  Sound Blaster  <  ESS AudioDrive (compatible)  <  ESFM  <  US Patent 5,578,779 METHOD AND INTEGRATED CIRCUIT FOR ELECTRONIC WAVEFORM GENERATION OF VOICED AUDIO TONES by ESS Technology (1996-11-26).pdf