void LoadSound(PackageItem item)
{
string fileName = _assetNamePrefix + Path.GetFileNameWithoutExtension(item.file);
string ext = Path.GetExtension(item.file);
if (_resBundle != null)
{
#if UNITY_5
item.audioClip = _resBundle.LoadAsset<AudioClip>(fileName);
#else
item.audioClip = (AudioClip)_resBundle.Load(fileName, typeof(AudioClip));
#endif
}
else
item.audioClip = (AudioClip)_loadFunc(fileName, ext, typeof(AudioClip));
}