private PlaySound SpawnBlackKey(int setID, int soundKeyID, PlaySound.SoundKey targetSoundKey)
{
float zOffset = offset * setID + soundKeyID * 0.5f;
Vector3 position = new Vector3(0, 0.3f, zOffset);
GameObject blackKey = Instantiate(BlackKeyPrefab, position, Quaternion.identity, transform);
PlaySound playSound = blackKey.GetComponentInChildren <PlaySound>();
playSound.pitchOffset = setID;
playSound.soundKey = targetSoundKey;
playSound.LoadAudioClip();
return(playSound);
}