Who What When Partials Fs Freq. Control Amp. Control Thaddeus Cahill Telharmonium 1897 ? Fixed DiGiugno 4A 1976 256 8kHz Discrete linear (4kHz) Baudot & Freed Reson8 1988 350 22kHz Fixed Exponential Decay Freed & Rodet FFT-1 on SGI 1995 400 44.1kHz Variable Linear breakpointThis implementation of additive synthesis was written up in an 1993 ICSPAT paper. A more detailed performance comparison may be found in a 1993 ICMC paper.