MP3 files are the most widely-used audio file for consumers. MPEG-1 Audio Layer III or MPEG-2 Audio Layer III (MP3) is a digital, audio-coding format used to compress a sound sequence into a very small file to enable digital storage and transmission. What is an MP3 (MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) file? Because AMR files are heavily compressed and focused on narrowband signals, they are not suitable for music files.ĭeveloped by: 3rd Generation Partnership Project (3GPP) Other software, such as the free audio-editing software Audacity, can open AMR files. AMR also opens with VLC media player, QuickTime, RealPlayer, and Xine. Since AMR files are often used on mobile phones, including for MMS messaging, most 3G mobile devices are able to open them. It is used regularly in Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS). The AMR speech codec focuses on narrowband signals, which makes it ideal for voice recordings and radio. What is an AMR (Adaptive Multi-Rate Codec) file?Īdaptive Multi-Rate (AMR) is a compressed audio file that is often used for speech coding.
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