The multi-channel trumpet plays through multi-channel bass guitar, and vice-versa. All output to a 9-channel transducer speaker system installed in the living room.
Coils: A prototype, the 5 coils constructed, the 5 coils installed in the bass guitar.

Guitar to Trumpet inputs (speakers): The speakers on input 0 & 1, speakers on input 2 & 3.
Installation in the room: on windows, doors, & surfaces.

Audio Examples:

Trumpet through Bass Guitar:
Bass Guitar through Trumpet (plucks):
Bass Guitar through Trumpet (scratches):