SoundData:setSample
Sets the value of the sample-point at the specified position. For stereo SoundData objects, the data from the left and right channels are interleaved in that order.
Contents
Function
Synopsis
SoundData:setSample( i, sample )
Arguments
number i
- An integer value specifying the position of the sample (starting at 0).
number sample
- The normalized samplepoint (range -1.0 to 1.0).
Returns
Nothing.
Function
Available since LÖVE 11.0 |
This variant is not supported in earlier versions. |
Sets the value of a sample using an explicit sample index instead of interleaving them in the sample position parameter.
Synopsis
SoundData:setSample( i, channel, sample )
Arguments
number i
- An integer value specifying the position of the sample (starting at 0).
number channel
- The index of the channel to set within the given sample (starting at 1). For stereo, 1 is left channel and 2 is right channel.
number sample
- The normalized samplepoint (range -1.0 to 1.0).
Returns
Nothing.
Example: Generate notes with a sine wave
local tau = math.pi * 2
local samplerate = 44100 -- Hz
local bits = 16 -- 8 bits results in very low quality sound
local channels = 2 -- löve only supports mono or stereo
local buffercount = 2 -- don't need too many buffers
local qsource = love.audio.newQueueableSource(samplerate, bits, channels, buffercount)
local samplepoints = samplerate/10 -- how many numbers does one buffer hold
local buffer = love.sound.newSoundData(samplepoints, samplerate, bits, channels)
local phase = 0.0
local frequency = 220.00 -- Hz
local amplitude = 0.5 -- 50%
local function synth()
phase = phase + (tau * frequency / samplerate)
return math.sin(phase) * amplitude
end
function love.update(dt)
while qsource:getFreeBufferCount() > 0 do
for i = 0, samplepoints - 1 do
buffer:setSample(i, synth())
end
qsource:queue(buffer)
qsource:play()
end
end
function love.keypressed(key)
if key == 'k' then
frequency = frequency * 2^(1/12)
elseif key == 'j' then
frequency = frequency * 2^(-1/12)
end
end
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