Hi @tom_august this is a very important topic given the global shortages we are seeing. I tend to use really low power micros rather than Pis for my stuff if I can, but I'd be very interested to hear about alternatives. I take it you are doing some reasonably heavy processing given the need for 4Bs? I have a few old 3s you are welcome to. A great list from @PshemekZ there. I don't know much about these: 

But didn't see them in the list. 

 @Freaklabs will likey have some ideas too. Looking forward to hearing more.

Cheers,

Rob

Hi Jamie, this is super exciting! I had not realized that PAMGuard integration was going to be part of the plan for Tethys - so thrilling! 

One quick question - when processing large datasets, often I end up with a series of binary/database files (e.g., separate runs for separate frequency bands). Does Tethys accommodate the multiple file scenario? 

Would love to give it a whirl when appropriate. 

Hi Alex--

The first thing I'd suggest you think through is how much data you have vs how much data you are currently working on. Because if you have data from previous years that you want to ensure you're storing securely and reliably but don't need immediate access to in order to run analysis on, that opens up some options. You can compress data using lossless algorithms like FLAC, where the compression ratio varies but 50% is a pretty good margin, and then convert back to WAV if necessary for reanalysis. Compressing using MP3, OGG, AIFF, or other compression algorithms is an option that saves even more storage space but you will lose information in ways you wouldn't with FLAC--it depends on your specific needs.

I'd also recommend setting up a RAID array (RAID = "Redundant Array of Inexpensive Disks"). This offers some additional security in event of a drive failure. A lot of folks who do video editing, probably the most similar use case to people working with acoustic data who also lack the institutional support of a large company or university IT department use a local NAS enclosure like https://www.qnap.com/en-us/product/ts-433 that are designed for just this purpose. Some higher initial startup costs than just buying individual USB hard drives but that does come with some perks including additional reliability and can be faster to read data depending on the exact drive specs and your local networking setup.

There are also low-cost cloud storage services like Amazon's Glacier. However, getting these set up can be a little bit tricky and they are not particularly responsive (for example, if you upload data to Glacier, it will be very safe, but getting it back if you need to use it again can take a few days depending on the dataset size).

Hello Alex,

   My information might not be that helpful to you, still, our organisation have an Enterprise license of AWS cloud and we store all our media files (video, pictures, audio etc.) there. We are also using a media management solution, Piction, thru which we upload the files into the S3 bucket and in the process it also captures the file metadata (some of the metadata values needs to be entered manually). This is useful to search the files if someone wants to view or process the file later. We are soon deciding on the file storage configuration so that old files will move to cheap storage like AWS Glacier, which will take a maximum of a week time to retrieve it.  

Jitendra 

Hi Alex,

I'd go much further along the lines that David @dtsavage sets out. Before jumping to implementations, better think through why you want to keep all that data, and for who? From your question, it appears you have at least three purposes:

1- for yourself to do your research

2- for others to re-use.

3- for yourself to have a back-up

For 1) you should do what works best for you.

For 3) use your organization's back-up system or whatever comes close to that

For 2 and 3) As you are indicating yourself : deposit your data at your nation's repository or zenodo.org if your nation doe not have one. It may be some documentation work ( which is what you should do anyways, right? ), but then you can stop worrying about holding on to it. Someone else is doing that for you and they do a much better job - because it is their job. Moreover, you increase the chance that other will actually become aware of all that data that you are sitting on by putting it into a repository. Who is otherwise going to find out and how that you have those disks on your desk? Lastly, depositing your data can also serve as a back-up. If you don't want to share it before you've published about it, there is likely the option of depositing under time-embargo or of depositing while requiring your consent for any re-use. 

You ask how many people actually do this? You can find the answers at the repository, but I suggest that what matters most is whether you want to for your own reasons, and whether your funders, or organization's funders require it.

I would also recommend Arbimon. It is well set up to handle Audiomoth recordings. Being cloud based, you will need a good internet connection for sound file upload. I'm just starting to investigate its use for Song Scope recordings. Setting up the call recognisers will be a slow process, but they can be made available to all users once done.

You could try using a video editor like DaVinci for looking at your video and audio together. I don't think DaVinci displays sonograms by default (just waveform) but I think it will open your selected audio in an external editor which would allow you to see the sonograms and make measurements with something like Audacity or Kaleidoscope.

The open-source program Audacity can show the spectrograms and histograms and has quite a lot of other useful features, e.g. playing ultrasound calls slower, so it can be heard by people. 

I love the idea of increasing international collaboration and inclusion within acoustic monitoring! I think there particularly needs to be more collab'ing between the terrestrial & aquatic/marine acoustic monitoring folks! 

It would be great for more virtual/hybrid events to foster such international inclusion, so anything to facilitate that sort of online platform would be awesome! 

There is also the new Bioacoustics Stack Exchange for Q&A. And the upcoming IBAC conference in Japan next October (2023).  

You might check out the devices listed in the Conservation Tech Directory - you can search for 'acoustic recorder' or 'ARU' or something like that.

The most common off-the-shelf models (other than Frontier Labs' BARLTs mentioned above😊) are Open Acoustic Devices Audiomoths & Hydromoths (which may be particularly useful for you since they come in completely watertight cases that can be stuck underwater for deployments), Wildlife Acoustics' SongMeter series, and Cornell Lab of Ornithology's Swift units.  

Camilo--

Are you interested only in airborne sounds or do you want to deploy hydrophones? That decision would inform a lot of other decisions about your purchase of equipment, as would having a clearer picture of your budget.

Hi there Camilo, 

What an interesting project! If you are looking for a lower cost, but effective tools for acoustic monitoring you might want to look into two options: 

SoundTraps - are very commonly used and perform quite well: 

SonarPoints - these are also a great instrument option: