GMA 350-style audio panel
An audio panel laid out as a GMA 350: choose which COM you transmit on and which you hear, the NAV idents, the speaker, with the marker beacon lamps. The keys drive the simulator's audio panel.
- Modeled on
- Garmin GMA 350-style audio panel
- Category
- Radios and panels
- Size
- 2 × 1 cells
- Version
- 1.0 · 2026-10-19
- Plan
- Pro
- Simulators
- MSFS 2020 · MSFS 2024 · X-Plane 11 · X-Plane 12
Features
- COM1 / COM2 keys (receive) and MIC1 / MIC2 keys (transmit) in the SPLIT COM group
- NAV1, NAV2 ident audio and SPKR keys, each with a white triangle lit when on
- MKR MUTE toggles the marker audio
- Outer, middle and inner marker lamps (blue O, amber M, white I) lit as the simulator passes the beacons
- Intercom, music, PLAY, AUX and MAN SQ keys and the volume knob are drawn but have no simulator effect (some printed as lit)
- At night the faceplate, keys and knobs take the red flood light while the display keeps its own colors, dimmed; the glareshield's warm light falls on the faceplate too when its dimmer is up (Settings > Dimmers > Glareshield, off by default)
On the iPad
- Tap COM1 / COM2 to start or stop hearing that COM
- Tap MIC1 / MIC2 to transmit on that COM
- Tap NAV1, NAV2, SPKR to toggle their audio; tap MKR MUTE to toggle the marker audio
Keys and controllers
Map any of these to a key, a game controller's button or axis, or a MIDI knob (how):
- Transmit on COM 1
- Transmit on COM 2
- Audio NAV 1
- Audio NAV 2
- Audio DME
- Audio ADF
- Audio MKR
Simulator data
What the Hub reads from the simulator for this instrument, and what the instrument sends back. Names are the simulators' own: MSFS SimVars and events, X-Plane datarefs and commands.
Reads
| Value | MSFS | X-Plane |
|---|---|---|
| Audio panel keys lit, one bit each (AudioBit: nav1, nav2, dme, adf, mkr, spkr) (bitfield) | NAV SOUND:1 (bool)NAV SOUND:2 (bool)DME SOUND (bool)ADF SOUND:1 (bool)MARKER SOUND (bool)SPEAKER ACTIVE (bool) | sim/cockpit2/radios/actuators/audio_selection_nav1sim/cockpit2/radios/actuators/audio_selection_nav2sim/cockpit2/radios/actuators/audio_dme_enabledsim/cockpit2/radios/actuators/audio_selection_adf1sim/cockpit2/radios/actuators/audio_marker_enabled |
| COM transmitting: 1, 2, 0 none (enum) | COM TRANSMIT:1 (bool)COM TRANSMIT:2 (bool) | sim/cockpit2/radios/actuators/audio_com_selection |
| Marker beacon: 0 none, 1 outer, 2 middle, 3 inner (enum) | MARKER BEACON STATE (number) | sim/cockpit2/radios/indicators/outer_marker_litsim/cockpit2/radios/indicators/middle_marker_litsim/cockpit2/radios/indicators/inner_marker_lit |
| COM1 heard (1/0) (bool) | COM RECEIVE:1 (bool) | sim/cockpit2/radios/actuators/audio_selection_com1 |
| COM2 heard (1/0) (bool) | COM RECEIVE:2 (bool) | sim/cockpit2/radios/actuators/audio_selection_com2 |
Sends
| When you… | MSFS | X-Plane |
|---|---|---|
| COM1 / COM2 keys (1 / 2 to hear, -1 / -2 to stop) | COM1_RECEIVE_SELECTCOM2_RECEIVE_SELECT | sim/cockpit2/radios/actuators/audio_selection_com1sim/cockpit2/radios/actuators/audio_selection_com2 |
| MIC1 / MIC2 keys | COM1_TRANSMIT_SELECTCOM2_TRANSMIT_SELECT | sim/cockpit2/radios/actuators/audio_com_selection (6 = COM1, 7 = COM2) |
| NAV1, NAV2, SPKR, MKR MUTE keys (AudioBit) | RADIO_VOR1_IDENT_TOGGLERADIO_VOR2_IDENT_TOGGLERADIO_DME1_IDENT_TOGGLERADIO_ADF_IDENT_TOGGLEMARKER_SOUND_TOGGLETOGGLE_SPEAKER | sim/cockpit2/radios/actuators/audio_selection_nav1sim/cockpit2/radios/actuators/audio_selection_nav2sim/cockpit2/radios/actuators/audio_dme_enabledsim/cockpit2/radios/actuators/audio_selection_adf1sim/cockpit2/radios/actuators/audio_marker_enabled |
Add-on aircraft with their own systems may use other variables; the Hub reads the standard ones.
Changes
The instrument's version counts what its faces share (the case, the mechanism, the data, the sounds); a face's own version counts that face alone.
- 1.0 2026-10-19
- First numbered version.
