AudioMoth Play allows you to explore filter and trigger settings on existing AudioMoth WAV files before applying them in the files.
Select a .WAV recording. Files longer than 60 seconds will open as a preview, allowing you to select a 60 second section to load. Once the file has loaded, you can navigate through your recording using the buttons above the plot, or by clicking and dragging to select the area you wish to see in detail. You can also double click on either plot to zoom in and centre on specific features of interest.
Add a low, high, or band pass filter using the controls on the right; selecting a radio button besides "None" to add a filter and then dragging the sliders to set the required filter frequency. The plots update in real time to show the effect of the filter.
Apply an amplitude threshold trigger by clicking the corresponding radio button on the right and then dragging the slider to set the threshold. The threshold will be drawn onto the waveform plot to show you which parts of the signal will trigger. You can change the units used to display this threshold using the drop-down menu at the top left of the plots. Once a threshold has been set, the plot will automatically grey out parts of the recording which fall below the threshold.
Selecting the frequency trigger will change the waveform to a frequency response plot. Use the radio buttons and slider to set the frequency band shown on this plot. Once you've chosen a band, drag the lower slider to set the frequency response threshold.
Selecting either the amplitude trigger or no trigger will allow you to add a low, high, or band pass filter; tick the checkbox to enable the filter and then drag the sliders to set the required filter frequency. The plots update in real time to show the effect of the filter.
Once you are happy with the filter and amplitude threshold settings, click Export Configuration to download a .config which can be loaded in the AudioMoth Configuration App (version 1.6.0 onwards).
You can use the controls beneath the plots to export WAV sound files, PNG, JPG, and PDF images, and MP4 videos of your AudioMoth recordings.