Format Guides
Audio Formats Explained: MP3, WAV, FLAC, AAC and More
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Apps66 Team
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From streaming music to professional recording, understanding audio formats helps you choose the right one for storage, sharing, and playback. This guide covers all major audio formats.
Audio Format Categories
Uncompressed
Raw audio data with no quality loss (WAV, AIFF). Large files but perfect quality.
Lossless Compressed
Compressed but perfectly reconstructible (FLAC, ALAC). Smaller than uncompressed, same quality.
Lossy Compressed
Removes "inaudible" data for smaller files (MP3, AAC, OGG). Some quality loss but much smaller.
Common Audio Formats
MP3
- Type: Lossy compressed
- Quality: Good at 256-320 kbps
- Compatibility: Universal
- Best for: Music distribution, portable devices
WAV
- Type: Uncompressed
- Quality: Perfect (original recording)
- Compatibility: Universal
- Best for: Recording, editing, archival
FLAC
- Type: Lossless compressed
- Quality: Perfect
- Compatibility: Good (most players)
- Best for: High-quality storage, audiophile listening
AAC
- Type: Lossy compressed
- Quality: Better than MP3 at same bitrate
- Compatibility: Excellent (Apple ecosystem)
- Best for: Streaming, Apple devices
OGG Vorbis
- Type: Lossy compressed
- Quality: Similar to AAC
- Compatibility: Good (open source)
- Best for: Gaming, open source projects
AIFF
- Type: Uncompressed
- Quality: Perfect
- Compatibility: Good (especially Mac)
- Best for: Professional Mac audio work
Understanding Bitrate
For lossy formats, bitrate determines quality:
- 64 kbps - Speech quality, very small files
- 128 kbps - Acceptable music, noticeable loss
- 192 kbps - Good music quality
- 256 kbps - Very good, most won't notice loss
- 320 kbps - Near-transparent, max for MP3
Audio Format Selection Guide
- Recording/editing → WAV or AIFF
- High-quality archival → FLAC
- Music distribution → MP3 (320 kbps) or AAC
- Streaming service → AAC or OGG
- Podcast → MP3 (128-192 kbps for speech)
- Audiophile playback → FLAC or WAV
File Size Comparison (1 minute stereo audio)
- WAV: ~10 MB
- FLAC: ~5-7 MB
- MP3 320kbps: ~2.4 MB
- MP3 128kbps: ~1 MB
- AAC 256kbps: ~2 MB
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Frequently Asked Questions
FLAC is higher quality (lossless) but files are 3-5x larger. Whether the difference is audible depends on equipment and listener.
Most use AAC or Ogg Vorbis at 128-320 kbps. Premium tiers may offer lossless FLAC.
No - you can't restore quality lost in MP3 compression. Only convert original WAV/CD sources to FLAC.
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Written by Apps66 Team
The Apps66 team creates helpful tutorials and guides to help you get the most out of file conversion and online tools.
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