My deployment times and recording durations are both modest, which mean that storage and battery life aren't an issue. If I want to record calls in the 2-8 kHz range, will I get the best results by setting the sample rate to 16 (the Nyquist rate for my target) or setting it much higher (for example the default of 48) and then filtering the recording in post?
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To see this working, head to your live site.
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Be aware that there is no anti-aliasing filter in the AudioMoth so you need to select a sample rate at least twice the maximum frequency in the environment - not just the maximum frequency of your target signal.