With S4, Avid has launched a smaller and more compact version of the Pro Tools S6 mixer for music and post production. The new S4 control surface has the same award-winning touch workflows as in the S6, but in a smaller, streamlined and semi-modular version. S4 uses many of the same modules as S6, but also has a brand new Channel Strip module that combines 8 faders with 32 buttons etc. S4 can be configured with up to 24 faders and 4 Display modules. Select a basic model in 3-, 4- or 5-System frame and expand with the desired modules.