Complete Guide to Audio File Formats

From MP3 to FLAC to AAC, the world of audio formats can be confusing. This guide covers every major audio format, explaining what makes each one unique and when to use it.

MP3

The most popular audio format in history. MP3 uses lossy compression to achieve small file sizes (about 1MB per minute at 128kbps). It's universally supported on every device and platform. Use for: everyday music listening, podcasts, sharing audio files.

WAV

Uncompressed audio at full CD quality (44.1kHz, 16-bit). WAV files are large (about 10MB per minute) but provide perfect quality. Use for: music production, audio editing, professional broadcasting. Convert WAV to MP3 for sharing.

FLAC

Lossless compression that preserves perfect audio quality at roughly half the size of WAV. FLAC is the standard for audiophile music libraries and archival. Use for: music archiving, high-end audio systems. Convert FLAC to MP3 for portable devices.

AAC

Apple's preferred audio codec, used in iTunes and Apple Music. AAC offers better quality than MP3 at the same bitrate. It's the default audio format in MP4 video containers. Use for: Apple ecosystem, streaming, video audio tracks.

OGG (Vorbis)

An open-source lossy codec that competes with MP3 and AAC. OGG Vorbis is commonly used in video games (due to no licensing fees) and streaming. Use for: game development, open-source projects. Convert OGG to MP3 for compatibility.

WMA

Microsoft's audio format, once common on Windows Media Player. WMA has largely been superseded by MP3 and AAC. Use for: legacy Windows applications and devices.

Format Comparison Table

Format	Type	Quality	Size	Best For
MP3	Lossy	Good	Small	Everyday use
WAV	Uncompressed	Perfect	Large	Production
FLAC	Lossless	Perfect	Medium	Archiving
AAC	Lossy	Better than MP3	Small	Streaming
OGG	Lossy	Good	Small	Open-source

Which Format Should You Choose?

For most people, MP3 at 256-320kbps provides excellent quality with universal compatibility. Audiophiles should archive in FLAC and convert to lossy formats as needed. For web and streaming, AAC or OGG offer the best quality-to-size ratio.