Casio Loopy / Wanwan Aijou Monogatari

OKI MSM6653A-457 ADPCM ROM editor

Browser-only editor for building a replacement Wanwan cartridge ADPCM sample binary. Upload WAV, MP3, OGG, FLAC, or any format your browser can decode; the tool resamples to the OKI rate, encodes to 4-bit ADPCM, packs phrases into the Wanwan-compatible table ROM, and lets you preview the decoded result. Existing OKI binary ROMs can also be imported, decoded into slots, played, edited, and exported again.

Bank naming policy: only trace-grounded commands are named. Every other slot is intentionally marked as a guess. The assumption column is based on the earlier original-sample categories, not on the freely licensed replacement pack.
0 keeps full active audio.
512ROM bytes
0Filled command slots
2Trace-known slots
20Guessed slots

Batch tools

Drop multiple audio files here. Files with command numbers in the filename, such as cmd13_bark.wav, 0x16.wav, or 16 dog bark.ogg, are assigned automatically. Others are left for manual assignment.

Preview and export