The model can be illustrated in many different ways. The sound set module consists of complex sounds that may be combined to form an instrument. The building blocks of rich sounds are complex waves, such as supplied by the core module. For non-complex synthesizers, primitives may become the sound. This module allows real synthesizers to have an intermediate level for sound production.
Some products call the sound set a 'patch', others call it a 'part', or 'timbre', or something else.
For details see the Texture module . A slow attack sounds different from a fast attack, even though all the other characteristics may be exactly the same. This module may logically also apply after the instrument module in the circuit. It is placed here as different instruments usually have different envelopes 'by nature'. For example, a violin has a slower attack than a piano.