I am trying to record my Sax into Cubase SE. The route is this:
From a Macki mixer, to an OMNI i/o, thrugh a Quattro Midi interface, Midied into a Roland SS88 keyboard Workstation, and on into Cubase in my Mac, useing OSX, Via USB from the Quattro. I can play Midi files thrugh this system out to the mains, But playing the keyboard or the Sax back into the Compuiter isn't working. I have checked all my settings over and over again. Midi thrugh, Local off, Midi soft thrugh, ETC. I have two Midi cables IE. IN and OUT. It seams that I have no Midi signal going back into the compuiter from the Quattro. The OMNI i/o is what I'm using for the Sax.
Is this problem between the Quattro and the Compuiter? Or what? Your help would be great.

Um,,, I am not shure you know what midi is, in fact I know you have not clue whatsoever...
I don't meen to be mean, but that's how it goes.
MIDI is not audio. In fact is has nothing to do with audio (exept the end result).
You sax is not a midi instrument. Trust me on this as I am a sax player also.
I am not going to pretend to know what all of the interfaces you mentioned are, because as I see it they are no use to you or me with you lack of know it all. If you want to record the sax, run a line from your mackie (some sort of audio out, like mains out or headphome out) to the line in of your mac. Choose an audio track in Cubase ( I have never had luck with Cubase) and record the adio track of your sax....... (I am assuming that you have the sax some how miced to the Mackie).

you two are crazy, if you aren't trying to get an m-audio omni i/o to convert audio into midi, then you're about to run a cable from your mains outlet into your mac line input (only kidding, i know you didn't mean that kaboombahchuck).

anyway, midi and audio are totally different - audio to a computer is a digital representation of sound (like the saxophone recorded through a microphone into the omni going through usb to the computer). Midi is a computer language that (mainly) tells electronic instruments and computers which notes should be played and when.

try not to get midi and audio confused

i am city pigeon

Boy, are we having fun with this one or what? I'm sorry I should have said that I'm having TWO, TWO SEPREATE problems. One with MIDI and one with AUDIO. My MIDI link was not a compleet loop untill I It appears that the USB hubs in the back of the tower aren't good for Midi, however when I plug into the USB jack on the keyboard witch is plugged into the same USB jacks in the back of the tower that wouldn't work, I get those lovely words, MIDI RECEIVED. Go figure. So now the loop is complete in OS9 MIDI IN and MIDI OUT. However in OSX I still have a problem.
Now as for the AUDIO, I was told that I could record AUDIO into the Computer by the OMNI i/o. I guess that I will just use the Mike in. It seams that that is the simplest way.

From what you have said so far, I be willing to bet you do not have the correct drivers for your midi and audio hardware.
I'm not shure what an OMNI is, but if it has a sound i/o ports, then you should be able to use that to record audio with.

Well, I changed things around a bit, and low and behold. MIDI RECEIVED ! MIDI OUT ! AUDIO IN, AND AUDIO OUT! One thing I did was: In my misery and discouragement I opened an old program called Melody Assistant in OSX and BADA BING! Everything worked. I haven't given up on Cubase yet. I think it could be a good program. However I will set it aside for the moment.
Thanks for your input kaboombahchuck But I knew I had the right drivers. By the way what program do you use? Been playing Sax long?
My buddy and I broke everything down and reconnected it all. The only problem is that we did so many things that I don't know what we did to fix it. I do know that the Melody Assistant came right on line with everything working first try. I should do some more reserch on editing programs and find something that works for me.
Thanks for your imput guys this is a good place.

I use Metro 6, with a MOTU 828 mkII. A whole bunch of other stuff, but that's the meat of it, that and the G5
I've been playing sax for around 25 years now. I don't have one here right now.. Traded the soprano for a tenor, and now I'm waiting for it to show up (custom order).
I do have a Yamaha WX5 wind midi controller to keep me going till then.

I will half to give Metro 6 a try. I have forty three Saxophones right now , Tenor Alto and Soprano. My most treasured is one that we call The First Conn . This horn is 107 years old. A 1898 C.G. Conn Alto with the serial number 831. It's a player too. I have never ben so in love with anything like these horns. I have never played a wind Midi controller. They seem interesting, but not the same. Well, have a good day.