You will be sent a download link to the masters, which will be in the appropriate format for your release. If is it a CD release, you will first receive all the masters as a WAV. Upon your approval, I use the WAV to create a so-called master DDP image (Disc Description Protocol), which is then digitally sent to the pressing plant. The pressing plant then uses the DDP to create the CDs. With vinyl, some pressing plants also use the DDP as a template, but WAV files are more commonly used. This should be discussed with the vinyl pressing plant of your choice. For online releases, you will receive the mastered WAV files.