Hi Christos Did you try fixing the ePTFE membranes to the inside of the sound hole and the 500-mesh on the outside, and did that work well? Sylfest

Thank you Alex for your answer. I have managed to get the file expansion working properly direct from the SD card. The problem was nothing more than a broken lock switch, but it stumped me anyway. I can now see how to work efficiently with the expanded files. As for any effects of gaps on call analysis, now that it's all basically working, I see that it's really a question of trying it out to see what works... Sylfest

I need just one acoustic membrane sticker for my single Audiomoth box. Would anyone have one they'd be willing to sell me for a tidy but limited unit profit? Thanks, Sylfest P.S. Failing that, is waterproof audio membrane used in any cheap audio devices one might cannibalize?