You'll receive a test CD for approval after mastering has been completed.  The test CD gives you the option to approve the master, or request changes.

mastering changes
If something was done by us during the mastering process that you would like to have changed, we'll be more than happy to make the change.  You can request multiple changes to the first test CD free of charge.  Changes thereafter will result in a fee of $45.00 per change.  The fee must be received before the changes are made and the next test CD is shipped.

Resubmission by the client
After listening to the test CD, the improved clarity will occasionally change your perspective of the mix.  You may want to remix one or more songs, or replace one or more songs with another version, and resubmit them before approving the final master. We want to make sure you're completely happy with the final product.  Therefore, submitting a remix is an option that's always available to you.  Be advised, however, that it's always necessary to remaster a song after a remix has been submitted. Submitting a remix, or a new version of a song, will result in a $75.00 (per song) remastering fee.  The fee must be received before the changes are made and the next test CD is shipped.

Change requests can be made by simply sending Bob an e-mail