File extension .AMR
| Full Name | Developer | Category |
|---|---|---|
| Adaptive Multi-Rate Compressed Audio Format | N/A | Audio Files |
The .AMR file extension is associated with the Adaptive Multi-Rate Codec (or AMR) audio file format. The format was developed by the mobile telecommunications industry and is now widely used in both cellular networks and Voice over IP (VoIP) applications. As its name implies, AMR is a multi-rate codec that utilizes a technique known as channel-dependent algorithmic switching to enable variable bit rates from 4.75 up to 12.2 kbps. This algorithm can dynamically switch bitrate without interrupting the signal.
Features
The AMR format contains of several compression algorithms that are optimized for voice signals and can compress regular voice signals up to 49%, with improved sound quality compared to other codecs like GSM, which helps capture speech comprehension even in low bit rate transmissions. Additionally, AMR supports frame size from 4 to 20 ms which lets it adjust its encoding scheme according to noise and speech conditions. It also allows the use of an additional signal channel for controlling the parameters of the encoders at the receiving end.
Similar File Extensions
The AMR format typically encodes both monophonic and polyphonic sounds and has native support for AAC, MP3, RealAudio, Windows Media Audio, .M4A, .M4B, and .M4P. These files may be opened natively using various software programs such as Windows Media Player, RealPlayer, or programs such as VLC Media Player, Quicktime Player, Adobe Flash Player and AIMP2 Media Player.
Programs for WINDOWS system
Programs for MAC system
Programs for LINUX system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .AMR) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .AMR extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .AMR file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .AMR extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .AMR extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .AMR file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .AMR file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .AMR file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .AMR file) will be extended to the maximum.
It is also good to check
- if the .AMR file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines
Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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