Garmin GMA 345, Pilot'S Manual

Page: 19 / 32

190-01878-01 Rev. A
Garmin GMA 345 Pilot’s Guide 19
GMA 345 Audio Panel
s
PliT
-Pa M
ode
During Split-PA Mode the pilot can continue to use COM1 for
transmission while the copilot delivers PA announcements. To initiate
Split-PA Mode, first enter Split-COM Mode by pressing both
MIC Keys
simultaneously, then press and hold the SPKR Key for one second.
3D AUDIO
3D Audio is useful when multiple audio sources are present. By using
different responses in each ear, 3D audio processing creates the illusion that
each audio source is coming from a unique location or seat position.
Because this feature uses different signals for left and right channels, it
requires wiring for stereo intercom and stereo headsets. If 3D audio is
activated when mono headsets are in use, the listener will still hear all audio
sources; however, there is no benefit from location separation.
With a single COM selected and 3D Audio enabled, the listener hears
the audio source at the 12 o’clock position. If both COMs are selected,
the listener hears COM1 at 11 o’clock and COM2 at the 1 o’clock position.
All other intercom positions are processed to sound like their relative
seat location. By default, the GMA 345 assumes the pilot sits in the left
seat. A Garmin authorized service center can make changes to the default
configuration.
ENABLING 3D AUDIO
Press and hold the PILOT Key to toggle 3D audio processing on and off
for all headset positions. When 3D Audio is enabled, the aural message
“3D audio left” is heard in the left ear followed by “3D audio right” in the
right ear. If the aural messages are not heard in only the left and then the
right ear respectively, the cause may be aircraft wiring or headset settings.
Refer to the following table if a headset or aircraft wiring problem is
suspected.