Hi Alex, and thanks for your answer. Started with my usual Kexin SD card. Then with a Sandisk. And indeed, it looks like doing it with default too. I understood it was the perfect test for bypassing scheduler etc.

I also tried different SD Card. Smaller (16Gb), Bigger (64Gb) Formatted as FAT32, exFAT. It has never recorded anything. Would it be a SD Card slot failure ? it doesn't seem but I cannot see it well inside. I may have done something bad, maybe.

And that's already VERY good. Ok. Can you confirm I can record 7 days in a row without any interruption ? (multiple files are totally ok) If that's not possible, what is the interruption time we have to use between LONG recording durations ? Thanks

Hi Alex, this is amazing. Thanks. Following up the project since 2019, BTW. No jack, no internal microphone at this time. Ok. I'm mainly interested by using (some) audiomoth for art purpose. I used to record, and retrieve sound descriptors (centroid, loudness) from long time recordings, then use this analysis for creating visuals and modulating some sounds too. (not using the sound itself directly) Is it possible to record at 32bit floating? It involves other type of ADC, I can imagine. My main idea here, calibration. I used to use 32bit floating when levels can change very much and I don't how much they can change.