I'm going to try this mixer out with SPLAT.  Firewire and USB ports to the computer.  Full 16/4 over both.  4 aux sends/returns with two doubling as auxes for two built in effects matrices.  This mixer has the exact same layout as the Mackie 1620, with some improvements.  My Mackie is on it's last legs, Firewire card-wise.  Lasted 10 years...but the Firewire card cables/connectors have degraded to where only 6 tracks will send full audio signals to Sonar.  I have some Behringer gear, and I like them.  We'll see if this mixer, and it's drivers, play nice.  Anyone else using a Behringer Mixer?  Your comments are welcome.

I am thrilled with this mixer.  The firewire and USB drivers are solid (win 7).  The strips sound better than my old Mackie 1620.  It is quiet.  I now like Behringer products alot.  I don't know what they did or how they pulled this off but for the price and features this mixer is 5 stars.  Excellent companion to Sonar Platinum.
 
Here is a link to what it looks like next to the Mackie.  Behringer on the left:
https://drive.google.com/...W-IQMmfYktHZDRmZ1lkRkk

Sorry, link no good here. Needs permission to access.

soens
Sorry, link no good here. Needs permission to access.

Should work now.

Yep! Nice comparison. The Mackie probably "feels" more solid than the Behringer being made in USA, tho new ones are made in China now, I think.

So I picked one up and am giving it a go. So far I like it. It's the only small mixer that's set up the way I like. It has more features than the average mixer it's size plus the 16 ch 96/24 interface, plus the 16 track 48/24 recorder.
 
It's pretty quiet.
 
EQs sound nice & can be sent over USB. Sweeping mids & 4 band on stereo channels.
 
Individual Phantom power (I hate global) though there's no light to tell you it's on.
 
16 channel interface @96/24, USB & FW.
 
It's $200 less than the old Korg D888 and beats it hands down in almost every detail except for the HD. There is none. To record direct you have to use an external USB HD or fast flashdrive. There could be room inside for a laptop HD if you're mod savvy.

@Thedoccal= Have you tried using the 1604 as a transport controller for Sonar? I've read the manual and Sonar's Help but all my attempts have failed to make it work.
 
A member on the Behringer forum says these don't work with Sonar. Wonder if that's true.

Compared to my MOTU audio express. it's much easier and more straight forward to use.
 
On the down side, sometimes when I navigate away from Sonar to another program, like IE, it will drop it's connection with Sonar. My MOTU never did that.
 
To hear the return signal from you computer you have to give up an input channel, tho you can switch between them:
 
ch 9/10=return 1/2
ch 11/12=return3/4
 
A dedicated return via a switch and volume knob would have been better.

Another issue with the UFX seems to be auditioning soft synth voices. When changing voices several times during PLAY, the UFX will drop out forcing you to close and reopen Sonar to get audio back.

That sounds like a pain in the butt. Nothing like having to close and reopen Sonar to kill the flow.