What Audio Format Does the Nintendo DSi Support? Only AAC in M4A/3GP

The Nintendo DSi (and DSi XL) supports only one audio format for playback via the "Nintendo DSi Sound" application:

• .AAC (MPEG-4 AAC-LC) in .M4A or .3GP container.
• Sample Rate: 8 kHz – 48 kHz.
• Bitrate: 16 – 320 kbps (CBR/VBR).
• Channels: Mono / Stereo.

Not Supported: MP3, WAV, FLAC, OGG, WMA, ATRAC.

Conversion Workflow

1. Source: MP3 / FLAC / WAV.
2. Tool: ffmpeg (CLI), Freemake Audio Converter, XMedia Recode, iTunes / Music.app (Convert to AAC).
3. Settings: AAC-LC, 44.1 kHz, 128-256 kbps, Stereo, .m4a extension.
4. Transfer: Copy .m4a files to /music/ folder on SD Card (root).
5. Launch: DSi Sound → "Play with your music" → Select file.

Recording

DSi Sound can record via built-in mic → saves as .m4a (AAC) on SD Card. Max 10 sec per clip (180 sec on DSi XL). No line-in.