Generating simple notes (sine wave) using LÖVE

[Nixola]

I've got this code to generate notes:

Code: Select all

local notes = {}

notes.a4 = 440
notes.diff = (2^(1/12))
notes[49] = notes.a4
for i = 48, 1, -1 do
	notes[i] = notes[i+1]*notes.diff
end

for i = 50, 88 do
	notes[i] = notes[i-1]*notes.diff
end

notes.soundDatas = {}
for i, v in ipairs(notes) do
	notes.soundDatas[i] = love.sound.newSoundData( 22050, 44100, 16, 1)
	for s = 1, 22050 do
		local sin = math.sin(s/((44100/v)/math.pi*2))
		notes.soundDatas[i]:setSample(i, sin)
	end
end

notes.sources = {}
for i, v in ipairs(notes.soundDatas) do
	notes.sources[i] = love.audio.newSource(v)
end

return notes

The problem is that I played every source, but it only plays a very short noise, then there's only silence. What am I doing wrong?

[Technicolour]

Add this to your new audio source: setLooping( true )

[Nixola]

That's not the problem, the notes are half a second long... Anyway I tried, just to be sure, and the only result I achieved is a short looping noise

[Boolsheet]

The samples you set with setSample actually start at 0. The code maps it more or less directly to the array.

New SoundData are uninitialized and may contain random data.

You always set sample 1. You always set the the sample with the index of the SoundData (the variable 'i').

Code: Select all

for i, v in ipairs(notes) do
   notes.soundDatas[i] = love.sound.newSoundData( 22050, 44100, 16, 1)
   for s = 0, 22050-1 do
      local sin = math.sin(s/((44100/v)/math.pi*2))
      notes.soundDatas[i]:setSample(s, sin)
   end
end

[Nixola]

Oh, that's quite a stupid error ^^'
Thanks Boolsheet (a sheet made out of trues and falses? ok, ignore it)