Physically inspired playable models of guitar, a tutorial

In this brief tutorial paper we review recent results concerning the interaction of the player with the string in the synthesis of guitar by means of digital waveguides. In particular, models for plucking the string with a finger or a pick are advanced, together with accurate and efficient models for the collisions of the string with the neck or the frets. These models are presented in a unified framework by means of scattering elements, which are time-varying and also non-linear for the collision case.