raw to AMR Converter

Convert raw to AMR online, for free.



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Auto
Sets how the audio is encoded. "Auto" suits most conversions. "Copy" reuses the audio as-is, so it is fast and keeps full quality, but only when the output format supports it.
100% represents the original volume. To double the volume, increase it to 200%. To reduce volume by half, select 50%
Fades the audio in at the start of the output.
Fades the audio out at the end of the output.
Enable if you want to reverse audio stream
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Specify the end position of trim (HH:MM:SS.MS). Leave at 00:00:00.00 to disable.


How to Convert raw to AMR?

  1. Click the “Choose Files” button to select your raw files.
  2. Click the “Convert to AMR” button to start the conversion.
  3. When the status change to “Done” click the “Download AMR” button

Easy to Use

Simply upload your raw files and click the convert button. You can also batch convert raw to AMR format.

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our raw to AMR Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 8 hours.


Raw audio is uncompressed pulse-code modulation (PCM) sound stored with no header at all — just a continuous stream of sample values. Because the file carries no description of itself, the sample rate, bit depth, channel count, and byte order have to be supplied by whoever opens it. That makes raw audio awkward to share but very useful in audio programming, embedded devices, and recovery work, where a plain stream of samples is exactly what is needed.

 

How to open a raw audio file?

The standard tool is Audacity. Use File → Import → Raw Data, then set the encoding, sample rate, and channels to match the file.

 

If you do not know the correct settings, start with 16-bit signed PCM, 44,100 Hz, stereo, and adjust until the audio sounds normal — wrong settings usually produce noise or a chipmunk-like pitch. Command-line users can play or convert raw audio with FFmpeg or SoX. Converting to a self-describing format such as WAV or MP3 saves you from repeating the guesswork. You can also convert the file with our RAW to WAV tool.

 

Developed by: No single vendor — a generic PCM stream

Initial Release: N/A


Adaptive Multi-Rate (AMR) is a compressed audio file that is often used for speech coding. The AMR speech codec focuses on narrowband signals, which makes it ideal for voice recordings and radio. It is used regularly in Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS).

 

How to open an AMR file?

Since AMR files are often used on mobile phones, including for MMS messaging, most 3G mobile devices are able to open them. AMR also opens with VLC media player, QuickTime, RealPlayer, and Xine.

 

Other software, such as the free audio-editing software Audacity, can open AMR files. Download audacity easily at SourceForge.net. Because AMR files are heavily compressed and focused on narrowband signals, they are not suitable for music files.

 

Developed by: 3rd Generation Partnership Project (3GPP)

Initial Release: 1999

Useful links:

https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec

https://www.etsi.org/


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