A sound asset validator for Unreal Engine 5. Place this in an Editor-only C++ module

SoundAssetValidator.cpp

#include "SoundAssetValidator.h"

#include "MetasoundSource.h"
#include "Sound/SoundCue.h"
#include "Sound/SoundWave.h"

bool USoundAssetValidator::CanValidateAsset_Implementation(const FAssetData& InAssetData,
                                                                UObject* InObject,
                                                                FDataValidationContext& InContext) const
{
	UClass* AssetClass = InAssetData.GetClass();

	return AssetClass == USoundWave::StaticClass() ||
		AssetClass == USoundCue::StaticClass() ||
		AssetClass == UMetaSoundSource::StaticClass();
}

EDataValidationResult USoundAssetValidator::ValidateLoadedAsset_Implementation(
	const FAssetData& InAssetData,
	UObject* InAsset,
	FDataValidationContext& Context)
{
	if (auto S = Cast<USoundBase>(InAsset))
	{
		bool bAssetFails = false;
		if (!S->AttenuationSettings)
		{
			AssetFails(InAsset, INVTEXT("Missing Attenuation"));
			bAssetFails = true;
		}
		if (!S->SoundClassObject)
		{
			AssetFails(InAsset, INVTEXT("Missing Sound Class"));
			bAssetFails = true;
		}
		
		if (bAssetFails)
		{
			return EDataValidationResult::Invalid;
		}
	}

	AssetPasses(InAsset);
	return EDataValidationResult::Valid;
}

SoundAssetValidator.h

// 

#pragma once

#include "CoreMinimal.h"
#include "EditorValidatorBase.h"

#include "MinerSoundAssetValidator.generated.h"

/**
 * Can't do this in a Blueprint since attenuation settings aren't available!
 */
UCLASS()
class YOURGAMEED_API USoundAssetValidator : public UEditorValidatorBase
{
	GENERATED_BODY()

public:
	virtual bool CanValidateAsset_Implementation(const FAssetData& InAssetData,
		UObject* InObject,
		FDataValidationContext& InContext) const override;
	virtual EDataValidationResult ValidateLoadedAsset_Implementation(const FAssetData& InAssetData,
		UObject* InAsset,
		FDataValidationContext& Context) override;
};