The project sample rate shown in the transport module is determined by The default sample rate from preferences as shown in the image above IF the project has no audio clips. If the project has audio clips the sample rate is read from one of the clip headers. All audio in a project must be the same sample rate. The bit depth shown in the transport module is Record Bit Depth NOT Audio Driver Bit Depth. Audio clips in a project do not have to be the same bit depth. So, this value