LÖVE

zorg wrote: ↑Mon Jan 07, 2019 7:45 pm Yes, it's possible to create any waveforms, but there's tons of other things you should consider:
- What kind of representation do you want to store the samplepoints? (lua numbers by themselves are 64bit double-precision floats in löve, although SoundData only supports 8 and 16 bit signed integers, but you set/get values in the normalized [-1,1] range.)
- What sample/sampling rate you're using or intend to use.
- Do you want to just generate the data, or do you want to also play it back; and if the latter, do you want to do that seamlessly in realtime or not.

All of the above are possible, but writing out an example for each would be a bit exhaustive (for me) so if you specify your needs a bit more, i might show you an example on how to do it.

Also, the wiki doesn't really specify that; SoundData can be created with parameters that specify an empty one of specific length you can write to (you can write ones you load data into from disk too, though), and for realtime stuff, there's QueueableSources. You don't even need to use the provided effects; they won't generate you any sine waves, that's for sure; the generator algorithm is up to you.

I would like to create a sine wave inside my code in love.

zorg wrote: ↑Tue Jan 08, 2019 12:01 am If you must use Source:setPitch then:

Code: Select all

local thisisluacodeandnotjavascript = true
local thisisluacodeandnotjavascript = false
local thisisluacodeandnotjavascript = {}
local thisisluacodeandnotjavascript = 'abc'
local thisisluacodeandnotjavascript = "def"
local thisisluacodeandnotjavascript = [[asgdjsghksjgsg]]
local thisisluacodeandnotjavascript = [=[ sdgkjnaoindpabg ]=]

sr = 44100 -- sample rate
t = 1/10 -- shortest sound length (in seconds)
l = math.floor(sr*t) -- waveform segment length
c = 1 -- assuming mono is fine
sd = love.sound.newSoundData(l, sr, 16, c) -- 16bits for quality
for i=0,l-1 do
sd:setSample(i, math.sin(2 * math.pi * (i/l))) -- create sine wave that doesn't pop... or at least tries not to.
end -- now you have a sine wave of length l seconds and pitch of t/sr Hz... if i'm not mistaken.
sr = love.audio.newSource(sd)
sr:setPitch() -- e.g. if you want 440 Hz, then you need to set this to 440 / (t / sr) or something; not gonna say it's a guarantee that it works if the multiplier is too small or too large; this is kinda a bad way to do all this tbh.
sr:play() -- if you want more simultaneous beeps, do sr2 = sr:clone() or something.

Feel free to disregard the first few local definitions, i find it kinda silly how people assume one would want to use anything but lua (maybe c but that's besides the point, nor is it supported) on this forum. :huh

Also apologies about the non-existence of formatting, i lost interest in this quickly but wanted to write something up still; even if it's wrong i'm sure you can adapt/fix it!

pgimeno wrote: ↑Tue Jan 08, 2019 12:43 am I may be missing something, but can't you have a long enough sample generated with e.g. audacity, play it and then stop it with a timer?