Audio Format Comparison

WMA vs AAC: Windows Media Audio vs AAC Compared

WMA (Windows Media Audio) was Microsoft's proprietary audio format launched in 1999 to compete with MP3. It delivered good compression at the time and had the advantage of Windows Media Player integration across hundreds of millions of PCs. AAC (Advanced Audio Coding) is the MPEG standard adopted by Apple in 2001 for iTunes and the iPod, subsequently used by YouTube, Spotify, and virtually every streaming platform. Two decades later, WMA is a legacy format while AAC is the industry standard for lossy audio.

WMAvsAAC

Quick Verdict

Use WMA when…

AAC is the clear winner

Use AAC when…

better quality at equivalent bitrates, broader device support, and no Windows-only baggage. WMA's main advantages (good quality at low bitrates, Windows integration) are matched or exceeded by AAC everywhere that matters. Convert your WMA files to AAC (M4A) or MP3 for better portability.

WMA vs AAC: Feature Comparison

Feature	WMA	AAC
Creator	Microsoft (1999)	MPEG / Apple (1997)
Quality at 128 kbps	Good	Excellent
Quality at 192 kbps	Very good	Excellent (near transparent)
iOS / macOS support	No	Native
Android support	Native	Native
Browser support	Edge only	Universal
DRM variant	WMA DRM (protected files)	FairPlay (Apple), Widevine
Lossless variant	WMA Lossless	ALAC
Streaming services	None (discontinued)	Apple Music, YouTube, Amazon

When WMA wins

✓Creator: Microsoft (1999)
✓Quality at 128 kbps: Good
✓Quality at 192 kbps: Very good

When AAC wins

✓Creator: MPEG / Apple (1997)
✓Quality at 128 kbps: Excellent
✓Quality at 192 kbps: Excellent (near transparent)

Frequently asked questions

Should I convert my WMA music library to AAC?

If you want to play the files on iPhone, Mac, or non-Windows devices, yes — convert to AAC (M4A) or MP3. Converting WMA to AAC is a lossy-to-lossy transcode (some quality loss), but at 192 kbps WMA, the result in AAC will sound fine. If you have WMA Lossless files, convert those to FLAC or ALAC for zero quality loss.

Can I play WMA on iPhone?

No. iOS has no native WMA decoder. You'd need a third-party app like VLC or Documents to play WMA on iPhone. For Apple ecosystem playback, convert WMA to AAC/M4A using a converter — you can then import the files into Apple Music.

Are WMA files DRM-protected?

WMA files from old DRM-protected stores (Napster, Rhapsody, Zune Marketplace) have copy protection that prevents playback on unauthorised devices. These files cannot be simply converted — the DRM must be removed first, which may not be legally straightforward. WMA files you ripped yourself from CDs are not DRM-protected.

Is WMA still used?

Rarely in new content. Windows Media Player still supports WMA, and some digital voice recorders and dictation devices default to WMA. But no major streaming service uses it, Apple devices don't support it, and even Windows 11 plays MP3 and AAC natively. WMA is effectively legacy.