Q: The software won't accept my Activation Code
A: 99% of the time, serial number errors are due to typos made when entering an activation code - or, when copying/pasting an activation code.
Make sure that all capitalization and dashes are correct, that you are using zeros instead of the letter "o", and the number "1" (one) instead of the letter "I".
When copying/pasting an activation code, check that there are no leading or trailing spaces left in the a activation code field.
There are known issues activating SoundSoap 3 with Garageband 10.0 and Sound Studio because of sandboxing - please see this article for a workaround:
Free Alternative App for Activation