Just use a data asset. To create a data asset:
- Add New → Blueprint Class → PrimaryDataAsset.
- Add variables (like your array of sounds) to the class. If you set values here, they will be the default values for that data asset.
- Add New → Miscellaneous → Data Asset, and pick the name of your data asset class.
- Open it up and set the values.
To use that data asset in a class, add a variable of your data asset class and set it to the data asset you want (you can have multiple data assets for a data asset class).