Worked up a nice seed of fake data in LinqPad before implementing in my Visual Studio solution.

LinqPadBogusDemo.cs

void Main()
{
	var playlists = PlayListFaker.Generator.Generate(5).ToList();
	playlists.Dump();
}

public class PlayListFaker : PlayList
{
	static Random random = new Random();
	public static Faker<PlayList> Generator
	{ get; } = new Faker<PlayList>()
	.RuleFor(p => p.PlayListId, p => IdCounter++)
	.RuleFor(p => p.PlayListName, p => p.Name.FirstName())
	.RuleFor(p => p.Sounds, p => LocalSfxV2Faker.Generator.Generate(random.Next(2, 12)).ToList());

	protected static int IdCounter = 0;
	public static IList<PlayList> PlayLists { get; } = PlayListFaker.Generator.Generate(5).ToList();
}

public class LocalSfxV2Faker : LocalSfxV2
{
	public static Faker<LocalSfxV2> Generator { get; } = new Faker<LocalSfxV2>()
	.RuleFor(p => p.Id, p => IdState++)
	.RuleFor(p => p.Name, p => p.Name.FirstName())
	.RuleFor(p => p.CreateDate, p => p.Date.Recent())
	.RuleFor(p => p.Duration, p => p.Date.Timespan(new TimeSpan(0, 0, 0, 10, 0)))
	.RuleFor(p => p.NumerTimesPlayed, p => p.Random.Number(25))
	.RuleFor(p => p.StarRating, p => p.Random.Number(5))
	.RuleFor(p => p.Creator, p => p.Name.FirstName())
	.RuleFor(p => p.Description, p => p.Lorem.Sentence());
	
	protected static int IdState = 0;
	public static IList<LocalSfxV2> PlayLists { get; } = LocalSfxV2Faker.Generator.Generate(5).ToList();
}