Help with music speeding up with level timer

[AlphaBlue1011]

I'm quite new to SMBX2, and am currently trying to figure out how to make music speed up once 100 seconds are left on the timer, similarly to basically any Mario game with a level timer. I plan on doing this for music in ogg format, and game music emulator formats like spc and vgm. Some code examples for doing that with both would be appreciated! ^v^

[deice]

create a file in your level folder (the one where all the custom graphics go) called luna.lua, open it in a text editor, and paste the following inside:

Code: Select all

local speedUpValue = 1.1 -- change this number to set how fast the song becomes

function onTick()
	if(Timer.isActive() and Timer.getValue() == 100) then
		if(Audio.MusicGetSpeed() <= 1 and Audio.MusicGetSpeed() ~= -1) then
			Audio.MusicSetSpeed(Audio.MusicGetSpeed() * speedUpValue)
		elseif(Audio.MusicGetTempo() <= 1 and Audio.MusicGetTempo() ~= -1) then
			Audio.MusicSetTempo(Audio.MusicGetTempo() * speedUpValue)
		end
	end
end

note that this might not work for absolutely every possible format, but it should work for at least every format which has a "tempo" argument listed here, as well as ogg files.

if you want this to apply to every level in an episode, create the luna.lua file in your episode folder (the one where your world file is) instead

[AlphaBlue1011]

tysm! i'm very much a lunalua noob, so i appreciate the help. i'll be sure to credit you for it!
i'd like to ask though, would it be possible to change the speed without changing the pitch? normally, mario games don't change the pitch.
EDIT: after a bit of research, i found out that changing just the tempo for ogg is not possible. a bit disappointing, but it's just a limitation. i'm fine with it though, it's not a deal breaker. ¯\_(ツ)_/¯

[deice]

EDIT: after a bit of research, i found out that changing just the tempo for ogg is not possible. a bit disappointing, but it's just a limitation. i'm fine with it though, it's not a deal breaker. ¯\_(ツ)_/¯

keep in mind that it might be possible to emulate it by calling Audio.MusicSetPitch() and setting the song to a lower pitch after speeding it up, but i'm not exactly sure how all the math works out in regards to it as i haven't experimented with it myself, so i didn't include it in the code. i encourage trying to test it by yourself if you have the time

[AlphaBlue1011]

I was experimenting, but it didn't work out. Essentially, the music is being sped up by an additional +0.15 (MusicGetSpeed() + 0.15), which works fine. but when I try to lower the pitch by 0.15 (MusicGetPitch() - 0.15), it doesn't do anything. What I did instead was speed it up by +0.15, but also switch the song to an identical version but with a -15% pitch change that I did with Audacity, so it'll basically be the same thing I was trying to do but done in a different way.
also, I changed the "Timer.getValue() == 100" to "Timer.getValue() <=100" so if the level starts with less than 100 seconds, which is what I'm doing for a remake of NSMB2's Coin Rush since some levels start with less than 100 seconds, it'll still do the adjustments. The == only does its job if it's AT 100 seconds, not lower. I'm just using my very minimal knowledge from a few google searches.