Convert audio: mp4a to spx

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Online UniConverter

Online or offline converter Online UniConverter (or Media.io) is a free online audio converter that converts your audio files to a wide range of output formats. In addition to audio files, Online UniConverter supports video formats as well. It’s easy to use, supports multiple languages and converts your files quickly. You can upload your files […] Go to online-uniconverter.
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.mp4a

MP4A, the file format used strictly for audio tracks released in 1990 and updated in 2004. It is often used in combination with the MP3, WAV and WMA formats and can be opened by a large variety of media players such as QuickTime and RealPlayer. Mime type: video/mp4v-es, audio/mp4 Learn more about mp4a

.spx

The SPX file format is a compressed audio format designed for speech. It is Open Source thus can be used for free. It compresses voices at 2 to 44 kbps and supports 8 kHz, 16 kHz, and 32 kHz compression in the same bitstream. Learn more about spx