Pokemon Gen 3 DirectSound Extension Hack

How to extend the number of DirectSound tracks so your custom music doesn't cut off

src: https://www.pokecommunity.com/showthread.php?p=7559059#post7559059

Binary
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Replace any occurence of the hex sequence "00 C5 94 00" with "00 Cx 94 00"
(x = new max. number of tracks)

Different games support different maximum without adverse effects:

game codes BPR*, BPG*, BPE* (Fire Red & Leaf Green, Emerald) = 12
game codes AXV*, AXP* (Ruby & Sapphire) = 7

Decomp
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Open the file src/m4a.c.
Line 80 should contain the following: | (5 << SOUND_MODE_MAXCHN_SHIFT));
(if not, just search for it)
Replace the "5" with the new maximum number of tracks, see Binary section above for supported maximum numbers.