Have you ever record something with Android Voice Recorder?
Maybe a lesson for universities, an interview, a course, … the opportunities are endless. There is a small problem. The standard Android Voice Recorder saves the file in 3ga format (that is the audio of video files 3gp).
So if you want to edit it with some software like Audacity to “clean it” from noise, increase volume or other, you must convert it to a more standard format such as MP3 or OGG.
On Linux you can use Sound Converter that is in the repositories of major distributions like Ubuntu for example.
Operation is simple, open the 3ga file to convert as shown below
then click on button CONVERTI.
Default is converted to an Ogg Vorbis. If you want to convert to a different audio format is sufficient to specify it in the preferences (Modifca → Preferences). The audio formats supported are: MP3, FLAC Lossless, MS Wave (wav) and AAC (m4a).
Now you have your audio files in the format you prefer and you can process it as you want.