The TouchPlayer/Mixer User Guide explains Mixer/Player shortcuts, recording and editing techniques, and customization. It explains the setup of MIDI devices for TouchMixer and TouchDesigner users.
A web page, TouchPlayer/Mixer Quick-Help has most of these techniques in a condensed HTML format.
TouchDesigner Reference Guide
The online TouchDesigner Reference Guide describes all the operators in TouchDesigner - Objects, Surface Operators (SOPs), Channel Operators (CHOPs) and Compostite Operators / Materials (COPs). Alternately you can click on the ? on any Operator parameter dialog in TouchDesigner. Download PDF version - Requires Acrobat 6.0+
TouchDesigner Scripting Guide
The Scripting Guide discusses the basics of using scripts, commands, and expressions in TouchDesigner. Also includes a reference section explaining all commands and functions available to the Touch user.
TouchDesigner Geometry Types Guide
The Geometry Types Guide explains the structure of the 3D surface data that a SOP (Surface Operation) creates, and the structure of the 3D geometry file (.tog) when it is written to disk.