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M4A to WAV: Convert Audio from M4A(MPEG-4 Audio) to WAV(Waveform) with River Past Audio Converter, M4A2WAV converter, conversion

What is M4A?

Because of its exceptional performance and quality, Advanced Audio Coding (AAC) is at the core of the MPEG-4, 3GPP and 3GPP2 specifications and is the audio codec of choice for Internet, wireless and digital broadcast arenas. AAC provides audio encoding that compresses much more efficiently than older formats, such as MP3, yet delivers quality rivaling that of uncompressed CD audio.

To convert MPEG-4 audio to other formats, you need to have Apple QuickTime installed.

What is WAV?

The format for storing sound in files developed jointly by Microsoft and IBM. Support for WAV files was built into Windows 95 making it the de facto standard for sound on PCs. WAV sound files end with a.wav extension and can be played by nearly all Windows applications that support sound.

Launch River Past Audio Converter

Once River Past Audio Converter is installed properly, launch Audio Converter.

Add File

Click on the "Add File" button on the tool bar. The standard file open dialog appears. Select "M4A - MPEG-4 Audio" in its "Files of type" combo box.

Select the file you want to convert and click "Open". The file will be added to the conversion file list.

If you cannot add the M4A file, you may need to install QuickTime. We use QuickTime to decode compressed MPEG-4 Audio files.

River Past Audio Converter

Select output format

Use the setting panel on the bottom of the window to control the output format. Click on the toggle to the left of the "Format" label to expand the panel. Select "WAV - Waveform" as the "Audio Type".

You can change the compressor, and depending on the compressor, you can change the sample rate, channel (stereo or mono), bits/sample, and bitrate.

Select output directory

Expand the "Output Directory" panel. Use the "Browse" button to select an output directory.


Click the "Convert" button on the tool bar.

River Past Audio Converter

   M4A to AIF
   M4A to M4A
   M4A to MP3
   M4A to MPA
   M4A to OGG
   M4A to RA
   M4A to WAV
   M4A to WMA
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