Convert Advanced Audio Coding (.aac) to iPod Audio (.ipod-audio) online for free. Fast, secure audio conversion with no watermarks or registration.
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 .m4a file when it's ready.
The iPod revolutionized portable music with AAC support from day one — the iTunes Store launched exclusively with AAC in 2003. The iPod Audio preset optimizes for the specific constraints of iPod hardware: limited processing power (especially on iPod nano and shuffle), small storage capacity, and the PortalPlayer or Samsung ARM SoC that powers the device's audio decoder. This ensures smooth playback even on the earliest iPod models.
iPod Classic, Nano, and Shuffle models have strict codec requirements. While they support AAC, files encoded with HE-AAC, high sample rates (96 kHz), or multichannel layouts will not play. The iPod Audio preset constrains encoding to parameters every iPod model handles: AAC-LC, 44.1 kHz, stereo, 128-256 kbps in an M4A container. This is especially important for iPod Classic users who manage large libraries on the device's mechanical hard drive.
FFmpeg encodes to AAC-LC at 44.1 kHz stereo with a maximum bitrate of 256 kbps. The output is placed in an M4A container with iTunes-compatible metadata atoms and the moov atom at the file start. Sample rates above 48 kHz are downsampled. Multichannel audio is downmixed to stereo. For iPod Shuffle, a lower bitrate (128 kbps) is recommended due to its minimal storage.
At 256 kbps AAC-LC, quality is transparent. At 128 kbps, quality is very good for casual listening through iPod earbuds. The iPod's DAC (Wolfson or Cirrus Logic, depending on model) resolves audio excellently for its era, so the AAC encoding quality matters more than the playback hardware.
| Device | AAC | iPod Audio |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Native | Partial |
| iPhone/iPad | Native | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
The iPod Audio preset guarantees compatibility with all iPod models and maximizes the music-per-gigabyte ratio. Perfect for iPod Classic owners managing large libraries and vintage iPod enthusiasts.
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| No |
| Funktion | AAC | iPod Audio |
|---|---|---|
| Fullstandigt namn | Advanced Audio Coding | iPod Compatible Audio |
| Filandelse | .aac | .m4a |
| Bast for | Superior to MP3 | iPod optimized |