Fix quiet ATC audio in Microsoft Flight Simulator by balancing voice and engine levels, checking output routing, radio controls and speech settings.
ATC audio is usually quiet in Microsoft Flight Simulator because the voice or communications level is low, communications are routed to another output device, the platform's audio mixer is attenuating them, or cockpit and engine sounds are masking them. Balance the channels, confirm the communications output, then check the aircraft radios.
How do I make ATC louder than the engines?
The fastest fix is to raise the voice or communications channel, lower competing aircraft channels and verify that both audio outputs use the intended device. The exact setting labels differ between Microsoft Flight Simulator 2020 and 2024, but the checks are the same.
- Balance the in-sim channels. Raise the slider labelled Voice, Voices or Communications, then reduce Engines, Cockpit and Environment slightly. Raising Master Volume alone will not help because it increases ATC and engine audio together.
- Check the communications output. Some configurations provide separate selectors for main simulator audio and communications. Set both to the same headset or speakers unless you deliberately want ATC on a second device.
- Correct the system output. On PC, confirm that Microsoft Flight Simulator and the communications endpoint are using the intended Windows device. Bluetooth headsets may expose separate stereo and hands-free endpoints; routing ATC to the wrong one can make it faint or poor-quality.
- Test stereo output. A system configured for surround sound while connected to stereo speakers or headphones can produce weak or hollow voice audio. Temporarily select stereo and disable virtual surround or spatial processing to test the downmix.
- Check the cockpit audio panel. Make sure the correct COM receiver is selected, its receive volume is up and the avionics or radio bus is powered. Detailed aircraft and add-ons are more likely to model these controls.
- Restart after changing hardware. If a headset was connected or disconnected while the simulator was running, close and reopen the simulator so its main and communications outputs are detected again.
Match the ATC symptom to the likely cause
| Symptom | Likely cause | What to check |
|---|---|---|
| ATC is audible but buried by engines | Channel balance | Raise Voices or Communications and lower Engines, Cockpit and Environment |
| ATC plays through another headset or monitor | Separate communications routing | Main output, communications output and the operating system's selected device |
| Voice sounds faint, hollow or distorted | Surround downmix or Bluetooth endpoint | Test stereo output and use the headset's normal high-quality endpoint |
| Only one aircraft has quiet ATC | Aircraft audio panel or add-on configuration | COM receive volume, monitored radio and aircraft-specific sound settings |
| Captions appear but no voice plays | Speech generation or routing failure | Use our checks for silent ATC speech and output routing |
| Every simulator sound is quiet | Master output or system-level problem | Follow the broader Microsoft Flight Simulator audio troubleshooting steps |
Do the COM radio volume knobs affect built-in ATC?
COM volume and audio-panel controls can affect ATC in aircraft that model their radio systems in detail. Confirm that the active frequency is on COM1 or COM2 as expected, that its receiver is monitored and that the corresponding volume knob is not near minimum.
A common mistake is transmitting on one radio while listening to the other. Automatic radio assistance can also retune a frequency, so recheck the active and standby windows when ATC becomes quiet or intermittent. Our explanation of ATC frequencies, radio monitoring and assistance settings covers that setup.
Why are some ATC calls missing rather than quiet?
Missing or cut-off calls usually indicate a speech-service, radio-tuning or wider ATC problem rather than a volume imbalance. Where the simulator offers online and offline text-to-speech choices, switching speech source is a useful diagnostic test; a network speech failure does not normally cause consistently low volume.
Third-party ATC tools may have their own volume control and output device, so the simulator's Voices slider might not affect them. Adjust the add-on's mixer and operating-system app volume separately, then test the built-in ATC to identify which audio system is responsible.