David@Jaffe.com the first grouping out of two sets of five criteria each. The first relates to the parameters that define the synthesis type - whether additive synthesis, physical modelling, waveguide physical modelling, FM synthesis, AM synthesis with parameters such as filtering, envelope shaping, metaparameters, to build HYBRID METHODS - linear interpolation, from Karplus-Strong to multiple complex sampling with filtering, interpolation, delays, comb (all-pass) filters, scaling, noise filtes