Why does the cooked fft return 0?

Development Audio
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1

I am trying to create some visualization using cooked fft, and I’m not entirely sure how to set it up. I got it to return an array of spectral data, and the inOutLastIndex variable progresses as expected, but all the elements contain a magnitude of 0. The sound is from a .flac file and everything else looks as it should, any help is appreciated.

variables in header file:

   UPROPERTY(EditAnywhere, BlueprintReadWrite)
		USoundWave* sound;

	TArray<FSoundWaveSpectralData> fourierData;

	uint32 lastIndex = INDEX_NONE;

Code in .cpp:

	fourierData.Empty();
	
	sound->GetInterpolatedCookedFFTDataForTime(GetGameTimeSinceCreation() + timeOffset, lastIndex, fourierData, true); //Get data
	if(sound->HasCookedFFTData()) UE_LOG(LogTemp, Warning, TEXT("DataAmount: %d"), lastIndex) //debug progression
	if (activeBuffer) {//write data
		for (int i = 0; i < width; i++) {
			dataBuffer1[4 * i] = fourierData[i].Magnitude * 255;
			dataBuffer1[4 * i + 1] = fourierData[i].Magnitude * 255;
			dataBuffer1[4 * i + 2] = fourierData[i].Magnitude * 255;
			dataBuffer1[4 * i + 3] = 255;
		}
		memcpy(dataBuffer1 + (width * 4), dataBuffer2, width * (height - 1) * 4);
		overWriteTexture(dataBuffer1);

This should write the data to a grayscale texture, (given that the magnitude is between 0 and 1, couldn’t find any info on that) but the texture is entirely black, (tested the writing to texture method with other data, it works well) and when I print the magnitude of any frequenzy in the debug log, it just says 0,0000. Thanks in advance for any reply.