There are a lot of free tools to do so, some are online. This article uses Audacity, a very good free edit tool for audio. The following are steps to convert an mp3 file to the telephony format. Open Audacity, open the mp3 file you have. Convert Stereo to Mono if the mp3 file is stereo. Select Tracks, Stereo tracks to mono from the main menu. Stack Exchange Network. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Convert your mp3 files to caf online & free. Audio Converter. MP3 PCM A-Law, G.711 (Uncompressed) PCM ยต-Law, G.711 (Uncompressed). Almost any player on any platform can open mp3 files. The audio is compressed with loss of quality, but the loss is negligible for the typical user, and the file size is usually less than that. MP3 is the most popular music format on the Internet. The MP3 file stores the actual music performance data. It can be played directly from a computer sound card or other device.
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More information on WAV, WAVE Audio (.wav)
The .wav file format
WAV are audio files playable via multimedia playback software such as Windows Media Player and similar softwars.WAV files contain any sounds like sound effects, spoken words and music. WAV files are large in size that is why they are becoming less popular and less common. WAV was created and developed by IBM and Microsoft. WAV files do not use a form of lossy compression unlike MP3 and MP4
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.wav technical details
WAV files are the standard digital audio format in Windows. 8 bit or 16 bit samples can be taken at rates of 11 025Hz, 22 050Hz and 44 100Hz using .wav extension. All general windows sounds like when you log out are in the WAV format. Although WAV files can store compressed formats such as MP3, the default content of a WAV file is Uncompressed.
Additional information about WAV file format
| File extension | .WAV |
| File category | AUDIO |
| Useful links | http://www.digitalpreservation.gov/formats/fdd/fdd000001.shtml#identification |
| File conversion | Convert a file to WAV |
| Developer | Microsoft & IBM |
| Associated programs | Ciber Link Power Director Roxio creater 2009 Microsoft Windows Media Player |
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| Name | MP3 | WAV |
| Full name | MP3 - MPEG-1 or MPEG-2 Audio Layer III | WAV - Waveform Audio File Format |
| File extension | .mp3 | .wav .wave |
| MIME type | audio/mpeg, audio/MPA, audio/mpa-robust | audio/vnd.wave, audio/wav, audio/wave, audio/x-wav |
| Developed by | Fraunhofer Institute | Microsoft & IBM |
| Type of format | Digital audio | audio file format, container format |
| Description | MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players. | Waveform Audio File Format is a Microsoft and IBM audio file format standard for storing an audio bitstream on PCs. It is the main format used on Windows systems for raw and typically uncompressed audio. The usual bitstream encoding is the linear pulse-code modulation (LPCM) format. |
| Technical details | The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source. | Though a WAV file can contain compressed audio, the most common WAV audio format is uncompressed audio in the linear pulse code modulation (LPCM) format. Audio in WAV files can be encoded in a variety of audio coding formats, such as GSM or MP3, to reduce the file size. |
| File conversion | MP3 conversion | WAV conversion |
| Associated programs | VLC media player, MPlayer, Winamp, foobar2000. | ALLPlayer, VLC media player, Media Player Classic, MPlayer, RealPlayer, Winamp. |
| Wiki | https://en.wikipedia.org/wiki/MP3 | https://en.wikipedia.org/wiki/WAV |