I wanted a digital mixer and have received an M400 to try. As I am unable to get the band together to test it I'm hoping to run a multi track recording through it to emulate a live mix. I downloaded the REAC driver and the demo Sonor program but have absolutely no idea where to start. Anyone know of any good tutorials for this or would anyone be prepared to give me a brief point in the right direction? Really appreciate any assistance. Thank you, Jacob.

Does your computer have a gigabit network port?
Does your sound card/audio interface have multple outputs? I guess stereo would work to try it out. 

Hi. I see that there is usb out from your mixer. Is this how you connect it to you pc? If so, you would have to download the usb drivers.
http://proav.roland.com/products/m-400/downloads/ for drivers and system software update.
Best of luck.

PC is connected via ethernet cable to M400 REAC port. How do I send from Sonar to M400 or is this not possible?

My understanding is REAC is used to record with playback through a different interface. Here is an explanation http://forum.cakewalk.com/FindPost/2271556. You might want to work this question through Roland Support.

Thanks all for the help. Will just stick with stereo for the trials then! Thanks again.