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Analyzation Software

Hi All!

I was wondering what software was easiest to use (preferably free!) for analyzing calls with the AudioMoth recorders. I’m fairly new to this type of work and am familiar with Kaleidoscope and Raven but do not own them myself. I am interested in studying Tree frog calls.

7 comments

7 Comments

Sonoquilibrium

Sep 17, 2023

I use in Audacity "Change The Pitch" so it changes just a pitch and the length remains untouched. It happened only, when dropping down the frequency (from 384hHz) the homan voices remained untouched and I don't get why.

Edwin Houwertjes

Sep 17, 2023

Replying to

Hi Sonoquilibrium what are you trying to do?

Do you need to stretch the the sound so you can hear it over a loneger period of time? To do "time espansion" you can use "ratio". I usually do that to save a sound to be played on some computer or sound-player. My audacity is in Dutch, but I guess you get the idea to chage frequency to other and you can set 1/10th of the original sample rate. I alsways set my the project sample rate to 44.1kHz since that is the most common samplerate for exporing wav files.

Sonoquilibrium

Sep 18, 2023

Replying to

Thank you Edwin! I tried also your way and see it's working great. In my Audacity, under Effects/Pitch & Tempo I have a possibility to change Pitch, Tempo, Speed and others. Firstly I tried with "Change Pitch" which was for my needs the most logical. Thank you for your way of working, appreciated!

Edwin Houwertjes

Apr 03, 2021

Adaudacity is a nice program to look at Spectrograms, but also wavesurfer looks nice. Both are free to also batexplorer can be used as free version.

Something like Batclassify might be of help preselecting audiofiles. https://bitbucket.org/chrisscott/batclassify/downloads/ I think it is based on Tadarida, or maybe you could use the acoustic pipeline if you need some auto ID-ing.

haller

Apr 03, 2021

I prefer Praat to view my bat recordings:

https://www.fon.hum.uva.nl/praat/

Justin Halls

Jun 22, 2019

Audacity is pretty much as good as anything else you will find, and it is free and (unlike some free software) is continuously being developed and improved. Some people say it is a bit slow loading a file, but once loaded navigation and zooming in and out is very easy and intuitive. You can add a label track which allows you to tag regions with annotations and that can be saved alongside the wav file it relates to, although you do have to explicitly name it to match. I find that Kaleidoscope is quicker for handling large numbers of small - 5-10 s - files, but Audacity wins for the longer recordings with multiple call instances that are typical from an AudioMoth. I have written a 'Bat Recording Manager' program (see https://www.echolocation.org.uk) which will accelerate the process of analysing batches of recordings by going through each file in turn opening it in Audacity and creating the necessary label file, then zooming in on the first 5 seconds so that you can scroll through the rest of the file adding notations. Then CTRL-ALT-L to save the label file and CTRL-Q,N to automatically move on to the next file. All the notes and details of the session and recordings and any screen shots are stored in a local database. It is designed for bat recordings but would still be useful for other species..