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.

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.

number sample

The normalized samplepoint (range -1.0 to 1.0).

Returns

Nothing.

Example: Play a sine wave

local samplerate = 44100
local bits = 8
local channels = 8
local buffercount = 30
local qsource = love.audio.newQueueableSource(samplerate, bits, channels, buffercount)
local buffer = love.sound.newSoundData(8, samplerate, bits, channels)
local sampleChunkSize = 64

local time = 0
local pitch = 200

local function synth(t)
    local tau = math.pi * 2
    return math.sin(tau * t * pitch / samplerate)
end

function love.update(dt)
    -- keep trying to fill up the queue with buffers so it can play
    -- continuously.
    while qsource:getFreeBufferCount() > 0 do
        for i = 0, sampleChunkSize-1 do
            local n = synth(i + time)
            buffer:setSample(i, n)
        end
        time = time + sampleChunkSize
        qsource:queue(buffer)
    end
    qsource:play()
end

function love.keypressed(key)
    if key == "k" then
        pitch = pitch + 200
    elseif key == "j" then
        pitch = pitch - 200
    end
end

See Also

• SoundData

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