Why convert KWZ to WAV?
Flipnote Studio 3D bundles the BGM and up to four sound effects inside the .kwz in a proprietary ADPCM codec that ordinary players can't read. Extracting to .wav gives you clean, uncompressed audio you can edit, remix, or archive on its own.
How to convert KWZ to WAV
kwz-parser (Python) OPEN-SOURCE
Run kwz-parser and select an audio track (id 0 for BGM, 1-4 for the sound effects) to export it as a .wav. The project is deprecated but still handles audio extraction.
flipnote.js library OPEN-SOURCE
In flipnote.js, call the parser's audio methods (getAudioMasterPcm / getAudioTrackPcm) to pull decoded PCM samples from a .kwz, then save them as a .wav.
About these formats
A .kwz file is a flipnote animation made with Flipnote Studio 3D, Nintendo's free drawing and animation app for the Nintendo 3DS. It packs hand-drawn frames on three layers, optional…
Open .KWZ details →
.WAV
Waveform Audio File Format
A WAV file is an uncompressed digital audio file introduced by Microsoft and IBM in 1991. Double-click one and it plays in Windows Media Player, macOS Music/QuickTime, or VLC on any system.…
Open .WAV details →Quality & what to watch
- KWZ audio is a custom 2-bit/4-bit ADPCM; decoding is a best-guess for DSi Library conversions, so some tracks can sound noisy or clipped.
- The BGM and each sound effect are separate tracks - exporting the master mixes them, while per-track export keeps them apart.
- WAV is uncompressed, so the files are larger than the original tiny KWZ audio; convert to MP3/OGG afterward if size matters.
Frequently asked questions
Can I get just the background music without the sound effects?
0 in kwz-parser to grab only the BGM, separate from the SE1-SE4 effect tracks.Why does the extracted audio sound distorted?
Do these tools need the 3DS or the original app?
.kwz directly on a computer.
