MP4 file format is also known as MPEG-4 Part 14 or officially called ISO / IEC 14496-14:2003. It is basically a multimedia format standard invented for a breakdown of the MPEG-4. This file is often used for digital audio and video streams to store, especially those by MPEG, but it can also be used to store other data such as subtitles and still images. His counterpart is MPEG-1 Audio Layer 3 or mp3. There is software acquirable to convert MP4 to MP3 and vice versa.
MP3 is a proprietary digital audio encoding format that the data compression. It is generally a widespread audio format for normal recording. It’s actually a standard for digital audio compression for playback or transfer music using digital audio players. The easiest and simplest way to change MP4 to MP3 using iTunes. Here is the list of instructions that will aid in the conversion process. First, open the iTunes program. They choose the number you want to convert. Defer to the iTunes menu bar and look for “Preferences” or alternatively, you can click on the “command” and “comma” buttons. Then choose “Advanced” option at the window. On the “Advanced” choose the button stating “Import” and when “Import Using”, choose “MP3 Encoder”. This means that the convert MP4 to mp3. Then under Options, click the “Custom”.
Actually, you can choose from one of the options available, but the “Custom” settings will ensure that you choose exactly bitrate. If you choose “Custom”, you will notice a pop-up window to make sure that your stereo sample and bit rate are your preferences. For ideal quality, use a setting of 44.1 kHz. But if you’re not sure how to then adjust the settings to their default settings will work well for you. Close the window, but before that make sure you selected the right song. Then choose “Advanced” menu in iTunes and click “Convert Selection to MP3″ and it will start to change MP4 to MP3 format. When the conversion is complete, you will see two songs with the same title. Check the file information to know what song is the new MP3 format.