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Long Term Deployment

Hello everyone. My team has been using hydromoths for years- love the product and appreciate the applicability in the marine environment- we use them to study manatee/dolphin vocalizations and manatee chewing sounds. We have never had an issues with our current program settings for short term deployments (<1 week) however we are attempting to get at least 4 weeks- but ideally 6 weeks- of data which shouldn't be a problem with our set up but the files stop recording 5-14 days after deployment. After several deployments and working few a through kinks I believe* I have determined the SD cards to be the potential issue. We have been using SanDisk Extreme 256 GB cards and PNY Pro Elite 256 GB cards. The SanDisk cards only record for 5-7 days while PNY record for 12-14 days. Given the SD card storage, the batteries should be the limiting factor with hydromoths lasting…

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Breanna Degroot

2 days ago

Thank you for your reply. We use Energizer Max AA. We have tried Energizer Ultimate Lithium batteries however they made a continuous clicking within the recording (on PNY and SanDisk SD cards) so we chose not to use them and opted for the Energizer Max AA. I see the SD comparison you provided, but don't see PNY. Do you know how that compares? When I pick up the hydromoth 6 weeks after deployment, the batteries are still working. I would have anticipated that the batteries were the limiting factor to recording duration but at some point the data stopped writing to the SD card. Can you explain why that is? I will discuss the possibility of changing the sample rate- however, if we keep it the same, would enabling energy saver mode help us lengthen deployments?

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2 days ago · posted in Support Forum

No Recordings on AudioMoths

Hi all! I've just retrieved my first two AudioMoths from the field, and I was disappointed to see that they hadn't recorded any data. One had a single 20-second empty audio file, which was dated to Jan 1, 1970. The other one had nothing. Looking at the config files, I can see that the sleep and recording duration are both empty, even though I know I left the default 5-second sleep duration and 55-second recording duration in the Configuration App. When I configured the AudioMoths, I then left them in USB/OFF for a few days while my team member moved them to the field, where he then set it to Custom. I'm brand new to using AudioMoths, so any advice would be greatly appreciated. Thanks!

Calibration

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Alex Rogers

2 days ago

Hi, What make and model of SD card and battery are you using? This device is configured to make 4 five-minute recordings each day. Is that what was intended? The CONFIG.TXT file was generated five months ago on the 12th May 2026. Was that when you deployed them? This version of the firmware is very well tested in the field so I don't think it's a bug. Something went wrong somewhere in the deployment process though. If the batteries were removed and the device switched to CUSTOM it would have waited for the acoustic chime (with solid red and flashing green LED) rather than starting to record. Try out the deployment process on your desk and see if there is an issue there. The LED pattern on switching to CUSTOM is important. The AudioMoth should either immediately start making a recording (flashing red LED) if inside a recording period, or wait for the next recording period with a flashing green LED.

Alex

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bnathaye

7 days ago · posted in Support Forum

3.5 mm socket on Audiomoth

Hi! With the 3.5 mm socket on the AudioMoth v1.2.0, would a microphone needing 2.5 Volt plug-in power work (I'm thinking specificaly about the Wildtronics Micro Mic PIP Microphone). Thanks!

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bnathaye

6 days ago

Thanks for the quick answer Alex!

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Roel Modderman

10 days ago · posted in Support Forum

Apple Silicon

Will there be a version of the Audiomoth Configuration app that will work with the Apple Silicon chip? Now, with the new MacOS 27, I have to install Rosetta and in about one year the support of Intel-apps will finish.

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Alex Rogers

Sep 29

Yes, we’ll update to universal binaries which will work on all Macs in the next updates - before Apple discontinue Rosetta support. In our tests, the native Apple Silicon versions are a lot more responsive and load a lot faster than the Rosetta supported verions.

Edited

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11 days ago · posted in Support Forum

Audiomoth seemingly stops recording after creating a 1kb blank audio file

We have deployed 2 audiomoths, both have presented what seems to be the same issue that causes them to stop recording.

The 1st one stopped recording barely a few hours into the first night it was deployed and programmed to start recording, at around 18:00, however it stopped recording at around 20:14, and didnt record anything at all in the next 2 weeks. Since it was my first time using an audiomoth, i chalked it up to me not configuring it properly.

The 2nd one fared much better, as it was deployed on the 12th and succesfully recorded every day in the scheduled hours, until its last file on the 26th, when it stopped at 5:38, and didnt record anything else until we recovered it on the 28th, earlier today.

In both cases, when I opened up the case and went to flip the switch to off, I noticed that…

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Alex Rogers

Sep 29

Hi, This sounds like the batteries went flat. Can you confirm what make and model of batteries and SD card you are using. If you use the 'Summarise AudioMoth Files' option under the 'Process' menu in the Config App you can generate a CSV file summarising all the WAV files on the SD card including the comments and the battery voltage before each recording. Can you share those files along with the CONFIG.TXT file from the SD card which will show the configuration settings used. This will help diagnose the problem.

Alex

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13 days ago · posted in Support Forum

More details needed on AudioMoth products

I think I've nearly worked out what I want to buy, but the website has made that very difficult for me through lack of relevant information.

I want to set up BattyBirdNET-Pi. I think the AudioMoth USB microphone and a case is probably all I need to go with my spare RPi4 8Gb. But...

It is conventional for product listings to show product dimensions and photos from all relevant aspects, e.g. showing circuit boards front and back (to show locations of components and ports), and side views when they would be clarifying. Similarly views of cases could show interior as well as exterior, as well as locations of any ports. This website shows only one view of each device, and two views of some (not all) cases.

It appears that the AudioMoth device may have built in battery holders but the AudioMoth USB microphone does not appear to have any…

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Alex Rogers

Sep 27

Hi,

Yes, the AudioMoth USB Microphone is powered by USB. There are datasheets describing the dimensions of the boards here: https://www.openacousticdevices.info/datasheets - and various application notes here: https://www.openacousticdevices.info/application-notes This application note describes the AudioMoth USB firmware and hardware: https://github.com/OpenAcousticDevices/Application-Notes/blob/master/Using_the_AudioMoth_USB_Microphone_Firmware_and_Hardware/Using_the_AudioMoth_USB_Microphone_Firmware_and_Hardware.pdf

The AudioMoth USB Microphone case that we sell is only splash proof and is not intended for permanent deployments.

If you are deploying this permanently, you will need to mount the AudioMoth USB Microphone inside some sort of housing with a hole and an acoustic vent to allow the sound to enter. We don't yet sell a fully waterproof housing for the AudioMoth USB Microphone. We may develop one if there is sufficient demand.

Alternatively, people sometimes just waterproof our existing AudioMoth USB Microphone case with an additional plastic bag.

Our external electret microphone is fully waterproof and easy to mount (https://www.openacousticdevices.info/product-page/audiomoth-external-microphone) in a custom housing. It works well for birds does not have the sensitivity of the internal MEMS microphone for bats. An alternative is to use the AudioMoth Dev board inside the AudioMoth Dev Case, and to use the AudioMoth-USB-Microphone firmware on this device. Alex

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alastair

13 days ago · posted in Support Forum

Set Up time for visiting a different country

I want to take my audiomoth to New Zealand from UK to record some bats but I wont have access to a PC when there. How can i set up the audiomoth time before leaving UK so I can use the audiomoth chime to set the local time in New Zealand?

I will have an ipad with me but am not aware i can connect the audiomoth to the ipad.

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Alex Rogers

Sep 26

Hi, Timezones are always confusing. The default operation is that AudioMoth uses UTC for all timestamps and for the schedule. The acoustic chime sets the time reference held by the AudioMoth using UTC. However, the timezone used for the schedule and the timestamps can also set independently (normally when you configure the schedule in the Config App). For your deployment, there are two options:

1. Set the custom timezone to New Zealand Daylight time and then enter the recording schedule that you need.

When you use the acoustic chime in New Zealand, the AudioMoth will use the UTC time from the app to update the time, and will always apply the UTC+13 correction, will use UTC+13 for all filenames and timestamps, and use the 09:00 to 16:00 (UTC+13) schedule that has been set. This is the easiest approach. 2. Sometimes you want to use the local time zone which you don't know beforehand, or there may be multiple deployment timezones. You may also want the schedule to adjust to the local timezone. For example, if you schedule 09:00 to 16:00 UTC+1 in the UK, you might actually want it record at 09:00 to 16:00 UTC+13 when deployed in New Zealand, so that they are both recording during equivalent daylight hours. To do that configure normally in local time - UTC+1 below. The schedule will appear as 09:00 - 16:00 (UTC+1) at this point.

Then in the 'Advanced Tab' also enable 'Use time zone in acoustic chime' and 'Also adust schedule to new time zone'. In this case, if you set a schedule of say 09:00 to 16:00 in any timezone in the Config App, it will be adjusted to 09:00 to 16:00 (UTC+13) when in a UTC+13 timezone.

It's also good to enable 'Always require acoustic chime on switching to CUSTOM' to ensure that you always are required to use the chime.

You can try this out by changing the timezone on your smartphone before deployment, or you can use the web based version on a desktop: https://chime.openacousticdevices.info If you click on the underlined timezone shown, you can select to use the timezone from the map location, and try out the chime for any location.

After switching to CUSTOM and playing the chime, the updated timezone and recording schedule will be shown in the CONFIG.TXT file so you can check that the schedule is correct. In the running example here, the device was configured to record 09:00 - 16:00 (UTC+1) but after the UTC+13 chime, the configuration is updated to record 09:00 - 16:00 (UTC+13).

Alex

Edited

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15 days ago · posted in Support Forum

Help with Arbimon

Hi, I know this is not the right forum for this, but I figure someone could point me in the right direction. I am having problems with the Arbimon uploader. The app on my computer will not let me toggle from site to site anymore. I also get a lot of errors on many of the recordings. I have about 50,000 files uploaded. Could there be an issue with how many files I have put through the uploader? Do I need to clear them out once they are uploaded? Thanks.

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15 days ago · posted in Support Forum

USB microphone and smartphones

Hi! I‘m looking into purchasing the USB mic for active bat recording using a smartphone (either iphone or android), and the last update I can find on whether it works is from February 2026. I was wondering if currently there are any available mobile apps that support the USB microphones recordings on either one. Thanks in advance!

USB Microphone

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Javiera Bristilo

Sep 24

Thanks for the quick reply! To connect the usb mic to an iphone with a C usb connection, is it possible to just buy an adapter and plug it in, or does it require other adjustments?