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Free
Soft4Boost Audio Converter
Convert your audio between MP3, FLAC, M4A/M4R/M4B, VOC, SHN, audio TS, OGG, etc.
Trial
Pazera Free MP4 to MP3 Converter
Convert MP4, M4A, M4B, M4R and AAC files to MP3 or WAV.
Free
Pazera Free MP4 to MP3 Converter (64-bit)
Convert M4A, MP4, M4B, M4R, and AAC files to MP3 or WAV formats.
Free
TunesKit Audiobook Converter
Convert M4B, AA, AAX, M4A audio books to MP3, AAC, WAV, M4A, and FLAC formats.
Demo