Oh good news! Thanks a lot Alex!

It's perfect thanks for the explanations that I understand perfectly! Thank you very much for your time and your explanations!

No, unfortunately no additional details: Recorded at 02:00:00 on 25/06/2020 (UTC + 2) by AudioMoth 243B1F055B1F279B with an average gain setting while the battery status was 4.2 V and the temperature 16.4 ° C .

Another question @Alex, I'm sorry I take advantage of it during the tests. If necessary, I create a new post: Continuing my question from yesterday (firmware 1.4.1), continuous recording in 300 sec file works perfectly, thank you again! Simply I have slight discrepancies between the files (nothing very important), here is the test carried out: You can see that after two files of 5 min, the files go to a duration of 4 min and 58 sec. Do you have any information on this? Thanks again Alex!

Thank you very much for your response Alex. Here is the config file: Device ID : 243B1F055B1F279B Firmware : AudioMoth-Firmware-Basic (1.4.1) Time zone : UTC+2 Sample rate (Hz) : 384000 Gain : Medium Sleep duration (s) : - Recording duration (s) : - Active recording periods : 2 Recording period 1 : 00:00 - 04:00 (UTC) Recording period 2 : 18:00 - 24:00 (UTC) Earliest recording time : ---------- --:--:-- Latest recording time : ---------- --:--:-- Filter : - Amplitude threshold : - Enable LED : true Enable low-voltage cutoff : true Enable battery level indication : true Here is the battery level for each file: - first (8:00 p.m. to 10:58 p.m): 4.2V - second (2:00 a.m. to 2:51 a.m): 4.2V It's quite strange, after posting this message, I configured my audiomoth for continuous recording with 3600sec of recording and 0 sec of sleep duration. The displayed battery level was 4.4V and the recording worked perfectly overnight. Thank you again for your help.

Thank you very much Alex, it works perfectly!

Thank you very much David Lee! It's perfect.

A little off topic, but do you have a solution to quickly cut several wave files into files of determined length (like a python script)?

Thanks for your reply, I understand.

Thank you Alex, yes indeed, the second solution is very interesting!

Thank you! Indeed it works, I think it also works with 1 sec of sleep (to try). Adrien CHARBONNEAU