Tune/Sound Meanings
Pixhawk-series flight controllers use audible tones/tunes and LEDs to indicate vehicle state and events (e.g. arming success and failure, low battery warnings).
The set of standard sounds are listed below.
Developers: Tunes are defined in /lib/tunes/tune_definition.desc and can be tested using the tune-control module.
Boot/Startup
These tunes are played during the boot sequence.
Startup Tone
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microSD card successfully mounted (during boot).
Error Tune
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Hard fault has caused a system reboot.
System set to use PX4IO but no IO present.
UAVCAN is enabled but driver can't start.
SITL/HITL enabled but pwm_out_sim driver can't start.
FMU startup failed.
Make File System
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Formatting microSD card.
Mounting failed (if formatting succeeds boot sequence will try to mount again).
No microSD card.
Format Failed
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Formatting microSD card failed (following previous attempt to mount card).
Program PX4IO
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Starting to program PX4IO.
Program PX4IO Success
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PX4IO programming succeeded.
Program PX4IO Fail
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PX4IO programming failed.
PX4IO couldn't start.
AUX Mixer not found.
Operational
These tones/tunes are emitted during normal operation.
Error Tune
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RC Loss
Notify Positive Tone
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Calibration succeeded.
Successful mode change.
Command accepted (e.g. from MAVLink command protocol).
Safety switch off (vehicle can be armed).
Notify Neutral Tone
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Mission is valid and has no warnings.
Airspeed calibration: supply more air pressure, or calibration complete.
Safety switch turned on/disarmed (safe to approach vehicle).
Notify Negative Tone
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Calibration failed.
Calibration already completed.
Mission is invalid.
Command denied, failed, temporarily rejected (e.g. from MAVLink command protocol).
Arming/disarming transition denied (e.g. pre-flight checks failed, safety not disabled, system not in manual mode).
Reject mode transition.
Arming Warning
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Vehicle is now armed.
Arming Failure Tune
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Battery Warning Slow
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Low battery warning (failsafe).
Battery Warning Fast
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Critical low battery warning (failsafe).
GPS Warning Slow
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Parachute Release
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EKF Warning
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Baro Warning
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Single Beep
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Magnetometer/Compass calibration: Notify user to start rotating vehicle.
Home Set Tune
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Home position initialised (first time only).
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