How to Add Custom BGM to Mario Kart Wii — Complete Tutorial

Published on 2026-07-18

Mario Kart WiiTutorialBRSTM

Overview

Adding custom background music to Mario Kart Wii is one of the most popular uses of BRSTM files. This guide covers all major methods — from USB Loader GX to CTGP Revolution to Dolphin Emulator.

What You'll Need

A Wii console with homebrew (or Dolphin Emulator on PC)
Mario Kart Wii game disc or ISO
Custom BRSTM audio files (create them using our converter)
SD card or USB drive (for Wii methods)

Method 1: USB Loader GX (Recommended)

Step 1: Prepare Your Files

Convert your MP3/WAV files to BRSTM format using the BGM Box converter. Set appropriate loop points for seamless playback.

Step 2: Find the Game ID

Mario Kart Wii's game ID is RMCE01 (NTSC-U), RMCP01 (PAL), or RMCJ01 (NTSC-J).

Step 3: Place BRSTM Files

On your SD card or USB drive, create the directory structure:

SD:/usbloader/music/RMCE01/
  strm_00.brstm  (title screen)
  strm_C0.brstm  (menu music)
  strm_XX.brstm  (race tracks)

Step 4: Enable in USB Loader GX

In USB Loader GX settings, go to Loader Settings → Custom BGM and set the path to usbloader/music/.

Method 2: CTGP Revolution

Place BRSTM files in SD:/CTGP/MyStuff/. CTGP detects them automatically. Use filename format slot_X.brstm where X is the music slot number.

Method 3: Dolphin Emulator

Place BRSTM files in Dolphin/User/Load/RMCE01/ and enable custom music in Dolphin's audio settings.

Tips

Use loop points for continuous playback during races
Test your BRSTM files in BGM Box Player before deploying
Back up original game files before modifying