mid2agb has been modified to allow more than just numbers when naming voicegroups and voicegroups have been renamed to match. A "voice_group" macro has been set up with a optional parameter for the starting note will shift the offset by the specified amount * 0xC which is the length of 1 voice in a voicegroup. All drumset voicegroups have a "starting_note" of 36.
Command used for the job:
egrep -rl ' $' --include *.c --include *.h --include *.s --include *.inc --include *.txt * | xargs sed -i 's/\s\+$//g'
Credits to Grant Murphy from Stack Overflow.