Convert AAC to WAV — Free Online Converter
Convert Advanced Audio Coding (.aac) to Waveform Audio (.wav) online for free. Fast, secure audio conversion with no watermarks or registration....
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Upload your .aac file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .wav file when it's ready.
About AAC to WAV Conversion
AAC delivers compressed audio at 128-256 kbps, while WAV (Waveform Audio) is Microsoft and IBM's uncompressed audio format from 1991. WAV stores raw PCM samples at full fidelity, making it the universal baseline for audio editing, mastering, and processing. Converting AAC to WAV decodes the compressed audio to raw PCM, producing a file that every audio application on every platform can read without codec dependencies.
Why Convert AAC to WAV?
Professional audio tools universally accept WAV as input. DAWs like Ableton Live, FL Studio, Reaper, and Audacity work most reliably with WAV files. When you need to edit, process, or master audio, starting from WAV eliminates codec-related issues entirely. WAV is also the standard format for CD burning, broadcast audio, and sample libraries used in music production.
Common Use Cases
- Importing audio into Ableton Live, FL Studio, or Reaper for music production
- Burning audio CDs from AAC music files (CD-DA requires PCM audio)
- Creating audio samples and sound effects libraries from AAC recordings
- Preparing audio for broadcast playout systems that require WAV format
- Feeding audio to analysis tools (spectrograms, loudness meters) that expect uncompressed input
How It Works
FFmpeg decodes the AAC stream to PCM and writes it as a WAV file with a standard RIFF header. The default output is 16-bit signed integer PCM at the source sample rate (typically 44.1 or 48 kHz). 24-bit and 32-bit float outputs are also available. A 4-minute stereo AAC track at 256 kbps (~8 MB) expands to approximately 40 MB as 16-bit 44.1 kHz WAV.
Quality & Performance
The conversion preserves every sample decoded from AAC — no additional quality loss occurs. WAV stores the exact PCM values output by the AAC decoder. The quality ceiling is the AAC source; WAV cannot restore information discarded during AAC encoding.
Device Compatibility
| Device | AAC | WAV |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | Native |
Recommended Settings by Platform
Spotify
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Apple Music
Resolution: N/A
Bitrate: 256 kbps
AAC format required
SoundCloud
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Podcast
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
Tips for Best Results
- 1Use 16-bit 44.1 kHz for CD burning — this is the Red Book CD-DA standard
- 2Choose 24-bit if you plan to apply effects or dynamic processing in your DAW — the extra bit depth provides headroom
- 3WAV files lack robust metadata support, so keep a consistent file naming convention for organization
- 4Consider FLAC instead of WAV if storage space is a concern — FLAC is lossless and 50-70% smaller
Related Conversions
AAC to WAV is the standard path to editable, uncompressed audio. The resulting WAV file works in every audio application and serves as the ideal starting point for any processing chain.