Recording/mixing engineer and sound designer was trained and certified by Digidesign since 1994. Mr. Valenzuela has participated in the design of several Digidesign and Alesis products. He also has worked as an engineer with John Waite (The Babys), Keith Emerson (Emerson, Lake, and Palmer), Michael Sembello, and other Grammy™ Award winners and nominated Latin artists.

He has written the "The Complete Pro Tools Handbook" and "The Complete Pro Tools Shortcuts" in English and Spanish, as well as other digital audio and MIDI books in Spanish. He is the founder and owner of AudioGraph International, a multi-faceted recording studio which not only encompasses recording, mixing, editing and post production, but is a Digidesign authorized and Certified ProSchool for the training of Pro Tools in Santa Monica, CA.