Convert to OGG
An OGG is a compressed audio file that uses free and unpatented Ogg Vorbis audio compression. It is similar to a .MP3 file, but sounds better than an equivalent size MP3 file, and can include song metadata, such as information about the artist and track data. Many software music players and some portable music players support OGG files.
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AAC Converter
A compressed audio file similar to a .MP3 file, but offering several performance improvements; for example, higher encoding efficiency for transient and stationary signals, a simpler filter bank, and better frequency management at-above 16 kHz; maintains a quality that is almost identical to the original audio source.
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