Open the Sony Creative Software product registration page. (see Resources).
Complete the online product registration form and select the appropriate version of Sony Acid Music Studio from the "Sony Creative Software product you wish to register" droplist.
Enter your Sony Acid Music Studio serial number in the "Serial Number" box. The serial number is inside the packaging if you purchased a hard copy of the program. If you purchased a digital copy, the serial number should have been emailed to you upon purchasing the product. Check the serial number to ensure that there are no mistakes. If you don't have a serial number, leave the box blank.
Click on "Submit Form" and a serial number and product key will be emailed to you.