Convert AMR audio files to MP3, OGG, etc.

AMR is an audio compression format optimized for speech coding. It is especially popular in modern mobile phones.

AMR has been adopted as the audio coding standard by 3gpp in October 1998 and is now widely used in GSM. Dynamically manage bandwidth by selecting from eight different bit rates.

Bandwidths 12.2, 10.2, 7.95, 7.40, 6.70, 5.90, 5.15, and 4.75 kb / s are based on 8000Hz samples with 20 millisecond frames (160 samples per frame).

There are programs to transform this format to more common audio formats (such as MP3 o WAV); for example, the Mobile Media Center. The use of these is relatively necessary because not all sound players have by default the codecs necessary to play files encoded as AMR.

Today, having a mobile phone is not just synonymous with making calls; owning one of these computers for a few years also means the possibility of taking pictures, listening to music, watching videos, etc. Sometimes it happens that not all multimedia formats are supported by computers, so it is necessary to look for its equivalent in a format that we can use or better yet have a tool that helps us convert one multimedia format into another.

Ffmpeg, the most used library in Linux for converting multimedia files, has stopped supporting libamr due to licensing problems and has incorporated support for libopencore-amr. Nonetheless, the ffmpeg package included in Ubuntu Karmic does not support AMR.

For this reason, we must use another application (actually a GUI for ffmpeg with AMR support), called Mobile Media Center.

Mobile Media Converter is a free application that allows, as mentioned before, converting various multimedia formats. For example: 3gp to mp3, mp3 to amr, etc. And if that wasn't enough, it also downloads YouTube videos in the format you like, the operation of the application is as follows:

1. Download Mobile Media Center from here.
2. Install the .DEB package.
3. If you have AMD64, open the terminal, go to the folder where the .DEB is located and run:

sudo dpkg -i --force-all mmc_1.5.0_i386.deb

Once done, go to Applications> Audio and Video> Mobile Media Converter. Then,

1. Add the file you want to convert by clicking on "+"
2. Select the output format, the quality, click on "Convert!" and ready.

As you can see, it not only allows you to convert the happy AMR files but also many others, which makes it a powerful option to take into account.

Official page | http://miksoft.net/mobileMediaConverter.htm