How do I turn off Morse code audio in FS2004?

In Microsoft Flight Simulator 2004 (FS2004/FS9), press Ctrl+1 to mute NAV1 identification, Ctrl+2 for NAV2, Ctrl+4 for DME, or Ctrl+5 for ADF. Ctrl+3 controls marker-beacon audio, not DME. These default shortcuts are toggles; you can instead deselect the relevant source on the cockpit audio panel without detuning it.

Which FS2004 shortcut mutes each Morse code or marker sound?

FS2004 assigns a separate default toggle to each navigation-audio source.

Press the same combination again to restore that audio. A common mistake is to treat Ctrl+3 as DME and Ctrl+4 as ADF; in the default FS2004 assignments, marker audio occupies Ctrl+3, so DME and ADF are one number higher.

How do I mute the identifier without losing the navigation signal?

Mute the receiver’s monitor channel rather than changing its frequency or navigation source.

1. Identify the receiver producing the sound. A VOR or localiser tuned in NAV1 uses the NAV1 audio channel; one tuned in NAV2 uses NAV2. DME and NDB signals use their own DME and ADF channels. If the radio stack is unfamiliar, see our walkthrough of FS2004 radio tuning and receiver controls.
2. Toggle only its audio. Use the appropriate keyboard command, or deselect the button labelled NAV1, NAV2, DME or ADF on the cockpit audio panel.
3. Check that guidance remains available. The CDI, glideslope and autopilot should continue using the tuned receiver. If the needle disappears or the autopilot stops tracking, you probably detuned the radio or changed the navigation source instead of muting its audio.

There is no separate localiser-audio shortcut. Mute whichever NAV receiver contains the ILS frequency. Audio-panel layouts and indicator lights vary between default and add-on aircraft, but turning off monitoring should not disable the receiver itself.

How do I turn off Morse code on a G1000?

On an FS2004 G1000 panel, switch off NAV1 or NAV2 monitoring on the associated audio panel; do not use the CDI control merely to silence the identifier.

FS2004 did not ship with a standard G1000 cockpit, so its G1000 installations come from aircraft or panel add-ons and do not all behave alike. A fully modelled installation normally has separate NAV1, NAV2, DME, ADF and marker controls on a Garmin-style audio panel. Press the illuminated source button to stop monitoring it.

If the panel button is not clickable, try the default FS2004 keyboard toggle. If that is ignored as well, the add-on may generate its audio through a custom gauge, in which case its own audio-panel control must be used.

The G1000 CDI softkey changes between GPS and VLOC guidance. Pressing it can change what drives the course indicator and autopilot; it is not an audio mute. A station identifier may also remain visible on the PFD after the audible Morse code is muted, which is normal.

Why is the Morse code still playing?

If the sound continues after muting one source, another receiver or a different type of cockpit alert is probably responsible.

• Both NAV receivers are monitored: turn off NAV1 and NAV2 separately. Two tuned stations can be audible at the same time.
• DME or ADF remains selected: use Ctrl+4 for DME and Ctrl+5 for ADF, or deselect those sources on the audio panel.
• It is a marker beacon: marker audio is a regular repeating tone rather than a station identifier. A blue, amber or white marker light usually appears with it. Use Ctrl+3 or the panel’s MKR/MUTE control.
• The shortcuts were reassigned: inspect FS2004’s control assignments for the VOR, marker, DME and ADF identification commands.
• An add-on has its own audio logic: custom panels may ignore FS2004’s global keyboard toggles. Use the aircraft’s clickable audio controls.
• The sound is not navigation Morse: autopilot-disconnect, stall, overspeed and other warnings will continue after every navigation-audio source is muted.

If several cockpit sounds are missing, stuck or behaving incorrectly, our FS2004 sound and audio troubleshooting answers cover the wider causes.

Should I leave the beacon identifier switched on?

For realistic operation, listen until the received Morse code matches the expected station identifier, then mute it if desired.

Positive identification confirms that the receiver has acquired the intended VOR, localiser or NDB rather than another facility on a nearby frequency. Our guide to reading and verifying a VOR’s Morse identifier explains how to perform that check.

FS2004’s stock navigation database reflects the simulator’s era. Frequencies and identifiers from modern real-world charts may not match the original simulator data, while scenery or navigation-data add-ons can introduce further differences. Compare the audio with the station information installed in your simulator rather than assuming a newer chart must match FS9.