ROM Hacks: High-Quality Sound Mixing for Mother 3 (Japan Only)

Started by RHDNBot, May 27, 2022, 12:12:36 AM

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Update By: SummerDragonfly


These changes mixes every individual channel at 16-bit audio before downsampling everything to 8-bit audio, as opposed to the default m4a mixer which mixes every channel at 8-bit audio (blame the GBA's DAC!). The game's original sample rate of 15.7kHz is preserved, although this patch is compatible with sample rates up to ~26.8kHz (going higher will overwrite memory and crash the game!).

This hack greatly reduces the number of quantization/rounding errors that pop up during the mixing process, making the classic GBA "background hiss" much quieter while making Shogo Sakai's music sound crispier than ever! Results seem even better when played back on actual hardware. Enjoy!!

PLEASE NOTE: This hack IS NOT COMPATIBLE with the MOTHER 3 FAN TRANSLATION! The author of this hack is currently working on the necessary changes to the fan translation in order to get high-quality sound mixing working in tandem with the translated text.

- HQ sound mixer ingeniously programmed by ipatix, inspired by "Golden Sun" (
- Mixer preparation and hacking by Summer Dragonfly
- Mother 3 decompilation and technical support: Kurausukun and theo3 (
- Extra technical support: phoenixbound and Yosuke Unbound
- Special thanks to the Mother 1+2 Fan Translation/Sound Restoration project and the PRET Discord community!

RHDN Project Page

Relevant Link


This is absolutely awesome... hopefully it will be compatible with the english translation patch at some point! Stellar music, best game ever.


 ;D Finally if the music couldn't get any better, it did!

I guess that's what it gets for being a [BIG SHOT] (Mother 3 fans should get this reference).