Select your product to confirm this information applies to you
GMA 340 Entertainment Inputs
The GMA™ 340 audio panel has two stereo entertainment inputs: Music 1 and Music 2. Music 1 is soft-muted during all aircraft radio activity and normally during ICS (intercom system) activity. Music 2 is a non-muted input.
More information about the GMA 340 can be found in the Owner's Manual.