What is VSTi, well as I understand it, it is VST instrument the (i) indicating an instrument. It the case of Sforzando it is a VSTinstrument that plays sfz files which are files that indicate how a bunch of samples are used to make up an instrument. For, example one might have a series of .wav samples that make up the notes on a guitar (or any other instrument) an sfz file would then say how each of the samples are played to make up a scale or whatever that can be played on a keyboard or entered into a midi file using some other form. Notation or maybe a piano roll. You would load the sfz file into Sforzando and add Sforzando as the synth to play the midi part. The sfz file simply says if you hit this note on a keyboard or midi file (say C) play this sample (hopefully a .wav that is a recorded C). This is fairly simplistic sfz files can carry more detail than just notes but that is for another time.

Just the way I understand it

Tony

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