Hi - I'm using an old 1.1.0 Audiomoth as a USB microphone connected to a Raspberry Pi (running BirdNET-Go). Everything works fine except I'm getting a high-pitched whine, appearing as regularly spaced lines on spectrograms (see screenshot below).

I've searched around, but haven't figured out the problem. At first, I thought it might be the power supply, but changing from mains PSU to a USB battery pack didn't make any difference. I also tried using a USB cable with ferrite beads, which also didn't affect the noise. It's not the Raspberry Pi either, as I get the same noise using my MacBook.

I'd very much appreciate any ideas about what's causing it and if/how I can resolve it.

The small white slider switch to switch between default off and custom has broken off after only three uses.

I have got a problem when trying to load a saved config file and sending this to an attached Audiomoth (AM).

With the latest APP version I can create a configuration, program the AM and save the file to disc. When trying to loading this config file into the App again I get an error message, which does not make sense to me, but it prevents me from programming an AM with the content of that file (see attached screenshot). The filter settings were correct when creating the file.

This problem occurs when using version 12.xx of the App. When I use Version 11.1. the problem does not show and everything works as expected. Latest firmware is installed.

Please check and advise how to proceed.

I would like to share some findings on the energy consumption of different microSD cards, inspired by earlier posts by Javier Seoane and Laura Molles (https://www.openacousticdevices.info/group/support-forum/discussion/923f8974-c6a1-4283-a89c-8d9c71b877af).

Since SD‑card write current is one of the main contributors to AudioMoth power consumption, choosing an efficient card can substantially extend deployment time.

Motivated by a limited budget and the rising prices of memory cards, I recently decided to acquire and test several lower‑cost, slower cards. I used a power meter capable of measuring true‑RMS voltage and current and integrating them into mAh. All measurements were performed on AudioMoths running firmware 1.11.1, using default settings (55 s recording, 5 s sleep) at 48 kHz.

All cards were purchased in 2026. I found no variation between samples of the same model.

I deployed the cards in the field and compared the voltage reported in the metadata with the discharge curve of the AA alkaline batteries used. The results matched…