Audio Formats Explained: MP3, WAV, FLAC, and AAC
Lossy or lossless? Bitrate or sample rate? Understand audio formats before you convert music or voice recordings.
Audio formats differ in compression, quality, and compatibility. Picking the right one before conversion prevents wasted storage and quality loss.
Lossy Formats: MP3 and AAC
MP3 and AAC discard audio data humans rarely hear, producing small files. MP3 is universal; AAC is common on Apple devices and streaming platforms. Use 192-320 kbps for music, 96-128 kbps for speech.
Lossless Formats: WAV and FLAC
WAV stores uncompressed audio - large files, perfect quality. FLAC compresses without losing data, roughly half the size of WAV with identical sound. Use lossless for mastering, archiving, and professional editing.
Pro tip: Converting MP3 to WAV does not restore lost quality. You cannot upgrade lossy audio by changing the container.
Conversion Tools
Switch between formats with our MP3 to WAV, WAV to MP3, and FLAC to MP3 converters. For any format, use the general Audio Converter.
Quick Decision Guide
- Phone playback: MP3 or AAC
- Studio editing: WAV or FLAC
- Podcast distribution: MP3 at 128 kbps mono
Sample Rate and Bit Depth
CD-quality audio uses 44.1 kHz sample rate and 16-bit depth. Higher rates (48 kHz, 96 kHz) matter for professional video production but waste space for phone listening. Match sample rate to your delivery platform - most streaming services accept 44.1 kHz.
Key Takeaways
- Lossy formats (MP3, AAC) for distribution and portability
- Lossless formats (WAV, FLAC) for editing and archiving
- Upconverting lossy to lossless does not restore quality