When I inspect the Audiomoth configuration file as it is written to the SD card, I find this setting just below the Threshold number:
"minimumAmplitudeThresholdDuration": 3,
There seems to be no way to modify that value through the configuration app. Am I overlooking something or is this just a fixed value, which can't be changed?
The setting is on the 'Filtering' tab and appears as soon as an Amplitude or Frequency filter is enabled.
Can you confirm which version of the firmware you are using as the standard firmware (AudioMoth-Firmware-Basic) doesn't read the settings from the SD card.