Dual Analog Flex I/O Dante/AES67 Interface, PoE. The Attero Tech by QSC Axon D2FLEXio provides cost-effective analog audio connectivity for integration into network AV systems such as the Q-SYS Ecosystem. Each analog audio I/O features a selectable switch to assign input or output audio connectivity. This flexibility provides a single product solution for cost-effective analog audio conversion to and from any Dante/AES67 system.