René Nyffenegger's collection of things on the web
René Nyffenegger on Oracle - Most wanted - Feedback -

fof (Csound opcode)

Audio output is a succession of sinusoid bursts initiated at frequency xfund with a spectral peak at xform. For xfund above 25 Hz these bursts produce a speech-like formant with spectral characteristics determined by the k-input parameters. For lower fundamentals this generator provides a special form of granular synthesis.
ar      fof        xamp, xfund, xform, koct, kband, kris, kdur, kdec, iolaps, ifna, ifnb, itotdur[, iphs[, ifmode]]