Hi everyone,

I’m working with multiple AudioMoth Dev (with GPS) units and I need precise, synchronized recordings across devices.

Instead of using the GPS-Sync-Firmware, I am wondering if I can use the Standard Firmware 1.11 and the Configuration App. In the Configuration App I’ve enabled:

• Enable GPS time setting: Yes

• GPS fix before and after: Recording periods

• GPS fix time (mins): 10

My Questions:

1. Are the WAV files already time-synchronized across multiple devices when using these settings? In other words, if all devices successfully get a GPS fix before recording, can I assume their timestamps are aligned closely enough for precise multi-device analysis?

2. With the dedicated GPS-Sync Firmware (https://github.com/OpenAcousticDevices/AudioMoth-GPS-Sync), a .csv file is generated containing synchronization information.Using the standard firmware with “Enable GPS time setting,” I don’t see any .csv file.

   • Does that mean synchronization is handled differently?

   • Is there any drift correction during recording, or is GPS only used to set the RTC before recording starts?

3. For applications requiring sub-second (or even millisecond-level) alignment between devices, is the standard GPS time setting sufficient, or is the GPS-Sync firmware required?

My use case requires reliable alignment across multiple units deployed simultaneously, so I’d appreciate clarification on the expected accuracy and recommended workflow.

Thanks in advance for any insight!