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How to Convert WMA to MP3
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When Do You Need to Convert WMA to MP3?
WMA is a Microsoft format from the Windows Media era, and it does not play on iPhones, most modern players or in many apps. Converting WMA to MP3 rescues older music libraries and voice recordings into a format that works everywhere.
What Happens When You Convert WMA to MP3
ffmpeg decodes the WMA and encodes MP3. Both are lossy, so this is a generation loss: the encoder works from audio that has already been compressed once and compresses it again. At reasonable bitrates it is not audible on speech and hard to hear on music. Duration, sample rate and channel layout carry across. Old WMA files are often at low bitrates to begin with, which limits how good the result can be regardless of settings.
Worth knowing before you convert
Converting cannot improve a poor source. A 64 kbps WMA becomes an MP3 that sounds the same, at whatever size you pick.
About WMA and MP3
audio/x-ms-wma
WMA is a series of audio codecs and their corresponding audio coding formats developed by Microsoft. It forms part of the Windows Media framework and was originally designed to compete with the MP3 format.
audio/mpeg
MP3 is the most widely used audio compression format for music distribution. It reduces file size by removing frequencies less audible to the human ear. MP3 files are supported by virtually all audio players and devices, making them ideal for music sharing and streaming.
Conversion Notes
Audio conversion from WMA to MP3 re-encodes at the highest quality setting appropriate for the target format. Lossless-to-lossy conversion (e.g., FLAC to MP3) is a one-way process — converting back to lossless does not recover the discarded information. Metadata tags (title, artist, album, track number) are mapped to the closest equivalent fields in the target format.
Frequently Asked Questions
A little, because it is a second lossy encode. Starting from a low bitrate WMA is the bigger limitation.