The Dolby Audio Bridge can either be used to send signal FROM a core audio DAW to the renderer (in the case of recording a .atmos) OR FROM the renderer TO a core audio DAW (if the user wishes to record speaker, re-render or binaural outputs). It cannot be used simultaneously for send and return. It can be used for 128 channels in Nuendo but only 32 channels in Pro Tools due to Avid software restrictions.