If you purchased Sound Forge 6.0 legitimately, either directly or through a bundle, you can recover your serial number:

: Many "found" serials are blacklisted or simply won't bypass the activation screen on modern hardware. Legal Alternatives

If you're finding it difficult to obtain a serial number for Sound Forge 6.0 or if you're looking for a more compatible or supported solution, consider the following alternatives:

Q: What is the Sound Forge 6.0 serial number? A: The Sound Forge 6.0 serial number is a unique code required to activate and register the software.