AAC vs WMA — Differences, File Size & When to Use Each

AAC vs WMA

Un confronto dettagliato tra AAC Audio e Windows Media Audio: dimensioni del file, qualità, compatibilità e quale formato scegliere per il tuo flusso di lavoro.

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AAC

AAC Audio

Audio Files

AAC is a lossy audio codec that delivers better sound quality than MP3 at similar bitrates. It is the default audio format for Apple Music, YouTube, and most streaming services.

Informazioni sui file AAC

WMA

Windows Media Audio

Audio Files

WMA is a proprietary Microsoft audio format from the Windows Media framework. Once common in the Windows ecosystem, it has been largely replaced by AAC and MP3 for general use.

Informazioni sui file WMA

Confronto dei punti di forza

AAC Punti di forza

Better quality than MP3 at equal bitrate — the industry standard since 2000s.
Universally supported on every smartphone, OS, and browser.
Efficient on battery thanks to widespread hardware decoding.
Scales from 8 kbps speech (HE-AACv2) to lossy-transparent 320 kbps.
Five-channel + LFE surround support out of the box.

WMA Punti di forza

Good quality at low bitrates (32-64 kbps) — outperformed MP3 in that range.
Native playback on every Windows version 2000 through 10.
Lossless variant available (WMA Lossless) for archiving.
Supports multichannel 5.1 surround audio.

Limitazioni

AAC Limitazioni

Patent-encumbered — encoders have licensing fees, which is why open alternatives (Opus, Vorbis) exist.
Slightly more complex to encode than MP3.
Raw .aac streams carry no seek index — tooling often prefers M4A/MP4 containers.
Lossy — not suitable for archival or studio production.

WMA Limitazioni

Proprietary — poor support outside Windows and Windows Media Player.
DRM variants made files brittle — many purchased tracks became unplayable when stores shut down.
Ecosystem abandoned — no modern editors, hardware decoders, or streaming services use WMA.
Windows 11 deprecated Windows Media Player entirely.

Specifiche tecniche

Specifica	AAC	WMA
MIME type	audio/aac	audio/x-ms-wma
Extensions	.aac, .m4a, .mp4 (container-dependent)	—
Standard	ISO/IEC 14496-3	—
Variants	AAC-LC, HE-AAC, HE-AACv2, AAC-LD, xHE-AAC	WMA Standard, WMA Pro, WMA Lossless, WMA Voice
Sample rates	8-96 kHz	—
Extension	—	.wma
Container	—	ASF (Advanced Systems Format)
Max bitrate	—	768 kbps (WMA Pro)

Dimensioni tipiche dei file

AAC

Speech podcast (64 kbps) 1 MB/min
3-min music track (128 kbps) 3 MB
3-min music track (256 kbps) 6 MB
Broadcast-quality 5.1 (384 kbps) 9 MB for 3 min

WMA

3-min song (128 kbps) 3 MB
3-min song (Lossless) 25-35 MB
1-hour talk (64 kbps) 28 MB

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Domande Frequenti

Carica il tuo file AAC su KaijuConverter per convertirlo in PDF, JPG, PNG o altri formati standard direttamente nel browser senza installare programmi.

Carica il tuo file WMA su KaijuConverter per convertirlo in PDF, JPG, PNG o altri formati standard direttamente nel browser senza installare programmi.

Sì, è gratuita fino a 25 MB (fino a 1 GB con Pass 24h o Pro) e tutti i file vengono eliminati automaticamente dai nostri server dopo 60 minuti.