The Audio schema. 10 loudspeaker and 4 microphones are used. Connected to 4 Audio cards in the computers. 
The 2 loudspeakers in the mainpanel are for all announcements of the computers. 
2 special loudspeakers in every seat shall give an impression of movement during taxiing and flight. Let us see, how that works. 
The Headset for CPT and F/O with two Loudspeakers and 1 microphone.  
picture coming soon  Two outside loudspeakers with high performance shall give the right and powerfull impression of the Airbus turbines and as well for cabin announcements from CPT, F/O or flight attendees.