Whirlwind ISOPODCI Audio Interface for Mobile DevicesWhirlwind ISOPODCI Audio Interface for Mobile Devices The Whirlwind ISOPODCI is a unique adapter that converts the TRRS jack audio of any mobile device into professional balanced signals. Output signals from the headphone section are transformer balanced and returned through 3 pin male XLR jacks. Line level audio sources can be sent into the microphone input of the mobile device through a balanced XLR input. A four conductor 3. 5TRRS cable is included.