This function gets the wave form data for an audio stream which is a table of floats representing the current audio frame as a wave. This allows things like visualisations.

If the element is a player, this function will use the player's voice.

OOP Syntax Help! I don't understand this!

• Method: sound:getWaveData(...)

Syntax

table|false getSoundWaveData ( sound/player theSound, int samples )

Required Arguments

• theSound: A sound element that is created using playSound or playSound3D. Streams are also supported
• samples: Allowed samples are 256, 512, 1024, 2048, 4096, 8192 and 16384.

Returns

• table|false: wave-data

Returns a table of samples floats representing the current audio frame waveform. Returns false if the sound is not playing yet or hasn't buffered in the case of streams.

Code Examples

Example 1 Example 2 (OOP) Example 3 Example 4 Example 5

client

This example creates a sound visualizer on the top left corner of the screen.

local soundHandler = playSound ( "sound.wav" )

function onSoundPlayRender ( )
    if ( soundHandler ) then
        local waveData = getSoundWaveData ( soundHandler, 256 )
        if ( waveData ) then
            for i=0,255 do
                dxDrawRectangle ( i, 128, 1, waveData[i] * 128)
            end
        end
    end
end
addEventHandler ( "onClientRender", getRootElement(), onSoundPlayRender )

client

OOP Required

This example creates a sound visualizer on the top left corner of the screen.

local soundHandler = Sound ( "sound.wav" )

function onSoundPlayRender ( )
    if ( soundHandler ) then
        local waveData = soundHandler:getWaveData( 256 )
        if ( waveData ) then
            for i=0,255 do
                dxDrawRectangle ( i, 128, 1, waveData[i] * 128)
            end
        end
    end
end
addEventHandler ( "onClientRender", getRootElement(), onSoundPlayRender )

client

This example creates a sound viewer, but only with bars down.

local soundHandler = playSound ("audio.mp3")
local samples = 256

function renderWave ()
    if (isElement (soundHandler)) then
        local waveData = getSoundWaveData (soundHandler, samples)
        if (waveData) then -- Avoid NaN values.
            for i=0, samples-1 do
                dxDrawRectangle (i, 128, 1, math.abs (waveData[i]) * 128)
            end
        end
    end
end
addEventHandler ("onClientRender", root, renderWave)

client

This example creates a sound viewer, but only with bars up.

local soundHandler = playSound ("audio.mp3")
local samples = 256

function renderWave ()
    if (isElement (soundHandler)) then
        local waveData = getSoundWaveData (soundHandler, samples)
        if (waveData) then -- Avoid NaN values.
            for i=0, samples-1 do
                dxDrawRectangle (i, 128, 1, math.abs (waveData[i]) * -128)
            end
        end
    end
end
addEventHandler ("onClientRender", root, renderWave)

client

This example creates a sound viewer on the bottom right corner of the screen.

local soundHandler = playSound ("audio.mp3")
local x, y = guiGetScreenSize ()
local samples = 256

function renderWave ()
    if (isElement (soundHandler)) then
        local waveData = getSoundWaveData (soundHandler, samples)
        if (waveData) then -- Avoid NaN values.
            for i=0, samples-1 do
                dxDrawRectangle ((x-samples)+i, y-128, 1, waveData[i] * 128)
            end
        end
    end
end
addEventHandler ("onClientRender", root, renderWave)

Changelog

1.3.2Added player element to use a players voice.

See Also

Audio Functions

• getRadioChannel
• getRadioChannelName
• getSFXStatus
• getSoundBPM
• getSoundEffectParameters
• getSoundBufferLength
• getSoundEffects
• getSoundFFTData
• getSoundLevelData
• getSoundLength
• getSoundMaxDistance
• getSoundMinDistance
• getSoundMetaTags
• getSoundPan
• getSoundPosition
• getSoundProperties
• getSoundSpeed
• getSoundVolume
• getSoundWaveData
• isSoundLooped
• isSoundPanningEnabled
• isSoundPaused
• playSFX
• playSFX3D
• playSound
• playSound3D
• setRadioChannel
• setSoundEffectEnabled
• setSoundEffectParameter
• setSoundLooped
• setSoundMaxDistance
• setSoundMinDistance
• setSoundPan
• setSoundPanningEnabled
• setSoundPosition
• setSoundProperties
• setSoundPaused
• setSoundSpeed
• setSoundVolume
• stopSound

Audio Elements

• sound

Reference

• Scripting Functions