Editing The .S File

xGal

Mhm

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Seen Feb 16, 2018

Aug 31, 2013

- Title -

Not much to say here... This is a tutorial on editing the .S file... Yup, the mysterious .S file that contains MIDI music's data!

Let's start!

Changing Speed

Spoiler:

If you use Anvil Studio, like me, you might've noticed that there's a speed limit of 300, but you've seen some music that their speed is over 300. Example: Vs. Turner (Pokémon Vega [510 speed lololol]). This is how you do it.

Open the .S file in notepad and search for the following:

Code:

    .byte    TEMPO , [I][B]X[/B][/I]*[I][B]M[/B][/I]_tbs/2

Where X stands, put the current speed and where the M stands, put the name of the .S file (example: if the name is battle.s, I will change X to "battle").

Now, to edit the speed, replaceX with the speed you want.

Changing Volume

Spoiler:

This one was found by Team Fail, so credit him!

If you once imported a MIDI from a DS game, you might noticed it didn't play in-game. It's because the music is too loud for the GBA to play.

Find the following:

Code:

    .equ    [I][B]X[/B][/I]_mvl, 127

Replace X with the name of the .S file.

Now, replace "127" with the volume you want. I recommend to set it to 79.

Changing an Instrument

Spoiler:

Navigate to the start of the track and find the following:

Code:

    .byte        VOICE , [I][B]X[/B][/I]

Replace X with:

Code:

Current instrument -1

Replace it with:

Code:

Instrument you want it to set to -1

MIDI Events

Spoiler:

Program Change

Spoiler:

Write the following in the position you want the program change to start:

Code:

    .byte        VOICE , [B][I]X[/I][/B]

Replace X with the instrument you want it to set to -1.

Panpot

Spoiler:

Write the following in the position you want the panpot to start:

Code:

    .byte        PAN   , c_v+[I][B]X[/B][/I]

Replace X with:

Code:

0 = Left
64 = Middle
127 = Right

That's it, FOR NOW!

Last edited: Sep 1, 2013