Sound Wave Visualizer

An Unreal Engine 4 utility tool, allowing you to visualize sound waves in 3D. Easy to integrate and minimum dependencies.

Features

• Use any of the default 3D props or even upload your own.
• Customiseable sound range, to achieve the visualization you want.
• Edit the sound track.
• Change number of bars/meshes.

How it works?

The most important part of the code is:

for(auto SpecData : TimeSynthComponent->GetSpectralData()){
    UStaticMeshComponent* SpectrumBar = SpectrumBars[SpecData.FrequencyHz / 50.f  -  1];
        
    FVector BarScale = SpectrumBar->GetComponentScale();
    BarScale.Z = 1.f + SpecData.Magnitude/5.f;
    SpectrumBar->SetWorldScale3D(FMath::VInterpTo(SpectrumBar->GetComponentScale(), BarScale, DeltaTime, 5.f));
}

The TimeSynthComponent returns the spectral data(which has several properties like frequencies, magnitude etc). Firstly, we pull the Frequency(in Hz) from the data, and divide it by 50 to get the bar we wish to modify. That is, every bar in the array/mesh spans over a range of 50 Hz. (Note: the -1 is there for the index).

Next, we change the Z-length, or the height of the bar calculated above. This is divided by 5 (or we can choose any other number), to get the new scale. Finally, we intepolate from current height to the calculated height.

Setup

• Install Epic games from their website
• Navigate to Unreal Engine in the sidebar
• Download Unreal Engine 4.25.3
• Open the project