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I expect that like every RTC (real time clock) also the RTC of the soundtrap drifts: a good crystal (20 ppm) may drift up to 10 minutes per year if kept constant at 25 °C. …

As the batteries have not been tested before, it is very likely that the quality of the batteries that "not easy to get hold of" as you say, are of bad quality, already used etc. Happens frequently. I …

The only suggestion at this point is to re-test the system: Off-load your 'recordings'; one never knows. prepare a new recording (make screenshot of deploy control) for some short time touch gently …

A quick search gave me this link (No air canada in it, but may be useful for comparison) So, I looked up SoundTrap which says : 12 NCR18650 batteries 3.7 V x 3.4 Ah so the total storage is >150 Wh, which … Yes, best to check with airlines, if it is OK to have them inside Soundtrap or if it were better to take them out and store them in one or more separate containers. …

Not speaking for OceanInstruments, but having the opportunity to scan the source code of Soundtrap Software, I know that the Host code is programmed in C#. … and The Click detector can be used in continuous wav files (with higher than 300 kHz sampling rate) or in the SoundTrap HF output files (*.bcl + *.dwv). …

While not using Soundtrap, I simply would try it out. …

From the Soundtrap user guide SoundTrap uses a custom file system to maximise performance and reliability. … This means the cards can only be read with the ‘SoundTrap Card Reader’ application supplied with the SoundTrap Host software. …

However, there are a few considerations that may help: soundtrap filing has typically file header followed by compressed data blocks, each of which has its own block header. the time stamps in OP are …

If you plan to get new hydrophones from HTI, be sure that you provide the correct specification (which you will need from Ocean Instruments). My gut feeling is that the final configuration hydrophone/ …

The answer depends on information that you did not present. A solution for shallow water applications is different to the one for deep water application. Also the distance from shore is important. Thi …

AFAIK, all the metadata are found in *.xml file that comes with the *.wav files, after decoding the *.sud files. The hydrophone calibration depend on the hydrophones used, which are most likely the sa …

Maybe https://github.com/Sound-Net/sudunarchiver is the way to go. I have not looked into the code but Jamie may chime in and tell you more. As I have not done Java programming for about 30 Years, I m …

This is a modified answer: Nothing is wrong with Soundtrap files, but SW seems buggy. …

The question on efficiency depends on the mode of operation. If you never care about the calibration tone and have a lot of disk space available, you can simply cut the first couple of seconds. As the …

A quick answer concerning decimation: according to matlab : "Decimation factor, specified as a positive integer. For better results when r is greater than 13, divide r into smaller factors and call de …