This is a standard bass sound source. After purchase, you will need to re-authorize it yourself. It seems that deauthorization is not required for re-authorization, so I will not perform any specific actions. Please understand that I will not provide any support for installation or authorization issues, such as being unable to authorize after purchase. Please purchase only if you agree to this. The serial number is listed in the user guide. Trilian Total Bass Module provides high-quality bass sounds. - Brand: Spectrasonics - Product Name: Trilian Total Bass Module - User Guide: Included Thank you for viewing.