Sweetwater Sales Engineers have the gear knowledge and the real-world experience to answer your questions about the Avid Pro Tools HD3 + I/O Trade-in Upgrade to Pro Tools|HDX + HD I/O 16x16 Analog. We'll be happy to take all the time you need to help you decide whether this is the right product for you. Submit your questions below and we'll get right back to you. Name, Email and Questions/Comments are required.