wiki/pages/_en-US/twilightmenu/custom-dsi-3ds-sfx.md

lang	layout	section	category	title	description
en-US	wiki	twilightmenu	customization	DSi/3DS Skins - Custom SFX	How to use custom background music and sound effects in DSi and 3DS skins for TWiLight Menu++

Beyond the global music option (DSi/3DS Theme Music), TWiLight Menu++ supports skin overrides for music. To set it up, you'll need to follow devkitPro's Getting Started guide, which will install mmutil for you. If these skin overrides are not used, the default sounds will be used instead.

Sound Effect Bank

The sound effect bank (sfx.bin) contains sound effects such as the icon select sound, etc.

File	Description
startup.wav	Played on startup. See the section on Startup sound for more details
back.wav	Back
launch.wav	Played when launching a game
select.wav	Played when moving the cursor in the per-game settings and select menu
wrong.wav	Played when reaching the end of the page
switch.wav	Played when switching pages
stop.wav	Played on the DSi Theme when the select cursor stops moving

All the files listed above are required to build a custom sound effect bank. If you want a sound to be mute, you can use a silent audio file. The .wav format is mandatory and the encoding must be PCM.

This file includes the sounds used in the default DSi and 3DS themes, along with the makefile used to build them into a valid sfx.bin file. Feel free to edit and change the sound files to make a custom sound effect bank.

To build your custom sound effect bank, open your terminal (or command line if you are using Windows), change the current directory (cd) to the folder where Makefile is, and then run the make command. You will get a resulting sfx.bin file that can be copied to the sound subfolder in your theme folder. This file must be under 512000B = 512 kB. Any file larger than that will result in either crashes or some sounds not playing fully.

Startup sound

While the other sound effects will work with any WAV file with PCM encoding, the startup sound must be in a specific format in order to work properly, otherwise there will be a gap between when the startup sound stops and the background music begins.

The startup.wav file must be 16-bit 16 kHz. You can use the v3.0.2 version of Audacity for example to convert to this format. Once the file is loaded in Audacity, change the Project Rate (Hz) to 16000, then press Shift+M, and change the Format to 16-bit PCM.

If your file is in Stereo, you should also go to Tracks > Mix > Mix Stereo down to Mono.

You must set PlayStartupJingle=1 in your theme.ini for the startup jingle to play.

Menu BGM

Menu BGM needs to be a 16-bit 16 kHz Mono raw PCM file. Below are two methods for converting audio files into that format.

Unlike sfx.bin, there is no size limit to bgm.pcm.raw.

ffmpeg (Terminal)

The simplest way to convert music for use in TWiLight Menu++ is to run this ffmpeg command in a terminal:

ffmpeg -i [input file] -acodec adpcm_ima_wav bgm.wav

Replace [input file] with the name of the file you want to convert. You can usually do this by simply dragging the file onto the terminal window with the cursor in the correct location.

Audacity

If you don't want to use the command line you can also convert using the v3.0.2 version of Audacity.

To convert the audio:

1. Load the file in Audacity
2. If your file is in stereo, click on the song then select Tracks > Mix > Mix Stereo down to Mono
3. Change the Project Rate (Hz) in the bottom left to 16000

To export in the correct format:

1. Select File > Export > Export as WAV
2. Set Encoding to IMA ADPCM
3. Set the output name to bgm.wav and click Save
4. Click OK to the metadata editing

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Once both of these files are ready to be used, place them in the sound subfolder for the skin. For example:

• sd:/_nds/TWiLightMenu/dsimenu/themes/[theme name]/sound/sfx.bin
• sd:/_nds/TWiLightMenu/dsimenu/themes/[theme name]/sound/bgm.pcm.raw

Be sure to now set the DSi/3DS Theme Music option in TWiLight Menu++ settings to "Theme" for the custom sounds to play.