Hi Alex. These are all very helpful comments. I ran a bench test and everything was working fine. When I came back from the field I was tired and clumsily pushed the switch from custom to default by accident and then to USB/off again. That may have erased all the previously collected data. I also tried to look at the comments in the files like the picture you sent but cannot see it. I am using windows and I thought I could reach that windows through the Properties menu. Thank you for your response. I will do another attempt at the field test and keep you posted.

Hi, Alex Rogers. I hope you are well. Recently I went out to the field to test the audiomoth SNR on underwater recordings taken with the H2A and compare it to other underwater acoustic dataloggers available in the market. Unfortunately, after I had program the audiomoth I waited for the first programmed recording cycle to start and it did work well. I headed out to the field to run the test's but the audiomoth stopped recording and I do not know why. Attached are the recorded files (the two that cannot be uploaded are the ones that worked, but they are different lengths). I will appreciate any feedback on this issue. Thank you!

Hi Alison. I am using an Aquarian H2C fitted to an audiomoth. Currently I am doing the waterproof testing to see if the unit holds. Next steps, which are comin soon is to compare SNR between the unit I am building and acoustic dataloggers currently available in the market. Thank you.

Sorry this was the chart I was going to send you. It is an HTI-96min with pre amp

HI Alex . Thanks to your help I was able to get the audiomoth to record on schedule. However I believe I need at least 5-10V to power the hydrophone I wish to attach and I believe that is why audiomoth cannot turn on the hydrophone. If I connect only the signal cable to audiomoth and power the hydrophone independently. Will the pieces be able to communicate with each other through the signal cable? Thank you the signal cable?

Thank you very much Alex. What would be the recommended voltage, 4.6V?