About Audio file
USB or memory file system: FAT16, FAT32
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MP3/WMA bit rate: 32-320kbps and varible bit rate
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MP3 sampling frequencies: 8-48 KHz
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WMA sampling frequencies: 32 KHz, 44�1 KHz, 48 KHz
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Id3 tag v1�0 or later
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Support WAV, FLAC, WMA, MP3
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