Another free method to convert M4B to MP4 is to use Audacity. Since Audacity is a free open-source audio editing software, you can use it as a makeshift converter. The basic workflow is to import M4B audio file and export it as MP3, and skip the editing part. Audacity is capable of converting your MP4 video files to MP3 only after you download a free, third-party FFmpeg library. Audacity itself doesn’t support video files, but installing FFmpeg is relatively easy, and you’ll have no trouble importing MP4 afterward. ffmpeg -i input.mp3 output.ogg. This command takes an MP3 file called input.mp3 and converts it into an OGG file called output.ogg. From FFmpeg's point of view, this means converting the MP3 audio stream into a Vorbis audio stream and wrapping this stream into an OGG container. Click the “Choose Files” button and select your MP3 files. Click on the “Convert to WAV” button to start the conversion. When the status change to “Done” click the “Download WAV” button. Choose a .MP4 video or any other supported media file from your device or cloud storage. Select .mp3 as the conversion format from the dropdown menu. Click the Start button to start converting your file. When the conversion is completed, click on the download link to get your converted .MP3 file. Step 1. Launch VideoProc Converter AI. Click "Video Converter" and "+Video" to import an MP4 video or a folder to it. Step 2. Click "Target Format" in the lower left corner. Choose "WAV" in the Music option and click and hit the "Done" button to confirm. Step 3. Solution 2. Convert M4A to MP3 with Audacity. Of course, you can also convert M4A to MP3 without iTunes, thanks to many other freeware on the Internet that can also support converting M4A audios to MP3 well, such as Audacity, a free and open-source audio converter that can convert, edit and manage your M4A files easily. The following guide will The data can be a raw bitstream in an audio coding format, but it is usually embedded in a container format or an audio data format with defined storage layer. This online audio converter supports vast conversions including OGG to MP3, OPUS to MP3, WAV to MP3, MP4 to MP3, M4A to MP3, MP3 to AAC, etc. Step 3. Launch Audacity. Step 4. Click File > Open, then select the MP3 file you want to convert. Step 5. (this step is optional) After the audio is imported, you can edit the file as you want. Step 6. Click File > Export > Export as WAV. Step 7. Select an output folder, rename the file, and choose an encoding format at the bottom according to download FFmpeg for Audacity 3.2.0 and later for Windows and Mac - LAME Websites ffmpeg, audacity, eurorack, max4live. INSTALLATION NOTES: Make sure your Audacity version is 3.2 or later. Check the Help menu for information. K0loTI.