Irregular file lenghts on Audiomoth 1.2.0

Question

Dear colleagues,

I am having a weird issue. During my recording nights, iI set audio files to be 7200 seconds (2 hours) long. If an audio file goes from 23:00 to 1:00, Audiomoth is saving a shorter file from 23:00 to 00:00, and then starts making regular 2 hour files (00:00-02:00, 02:00-04:00 and so on).

Is anyone having a similar trouble? It's not a huge problem for me but I am worried that could be a major softare problem.

Thanks!

Alex Rogers · Accepted Answer

Hi, This is more of a feature than a bug. The AudioMoth's daily recording cycle operates on a 24 hour cycle referenced against UTC - largely due to historical decisions in early version of the firmware that we've tried to maintain compatibility with. That means that any recording that spans 00:00 will be split into two. You can see this in the scheduler screenshot where I've added a recording period from 23:00 - 07:00. In this case without sleep/record cycles I would get a 1 hour recording and a 7 hour recording. This effect is combining with your 2 hour recording period to give you a 1 hour recording, and a sequence of 2 hour recordings. With cycling recordings that are shorter (e.g. 1 hour or 10 minutes) this effect isn't observed. Although the AudioMoth is still scheduling the recordings in the same way. Alex

This effect is combining with your 2 hour recording period to give you a 1 hour recording, and a sequence of 2 hour recordings.

With cycling recordings that are shorter (e.g. 1 hour or 10 minutes) this effect isn't observed. Although the AudioMoth is still scheduling the recordings in the same way. Alex

Oriol Baena-Crespo · Answer

Thanks a lot Alex and congrats for the work done!