CREATE TABLE table_name_71 (digital_analog_signal VARCHAR(255), available_interface VARCHAR(255), retail_name VARCHAR(255))
What is the Digital/analog signal with an Available interface with pci express, with Retail name with all-in-wonder x600 pro?
    
SQL: SELECT digital_analog_signal FROM table_name_71 WHERE available_interface = "pci express" AND retail_name = "all-in-wonder x600 pro"