Hows it going?

We have an m-audio firewire 1814 and a mackie onyx. Want to use the 8 ins on the 1814 for a machinedrum and the onyx for the rest of our gear - is there a way to combine the 2 so its recognised as 1 soundcard or can you set up live to read 2 soundcards? Running XP / live 7.10

Help much appreciated!