MIDI is usualy transmitted over 16 channels a MIDI cable. MIDI Omni means the MIDI device receives MIDI data from all 16 MIDI Channels. Setting the MIDI input for a specific channel, i.e. MIDI chanel 1, will tell the receiving MIDI device to only listen to data comming through MIDI chanel 1.
How to properly setup a MIDI track.
Before you record make sure the "In" is set to the MIDI channel your synth is sending on. Make sure the "Out" is set to your Traveler MIDI. Set the "Channel" to the MIDI channel your synth should recieve the MIDI information, usualy the same as whats set for "In". Set the "Bank" and "Patch". The "Patch" number is the number your soundpatch is located at in your synth. The "Bank" number is the same as the bank number the soundpatch you want is in. Example, I want Sonar, on channel one, to tell the synth to play soundpatch starynights, which is patch#125 in bank#2 on the synth. Now you are setup to receive and send MIDI.
Now to setup an audio track. If one isn't already up, go to "Insert" and select "Audio Track". Set the "Input" and "Output" accordingly; make sure its your Traveler's audio, not MIDI. That's just about it. Now, make sure the Audio Engine button has been selected. Otherwise Sonar won't transmit or receive audio. Also, having to many programs running at the same time may automatically turn the audio engine off. It happens to me when I'm online. Once the Inputs and Outputs are setup and the audio engine is on, you should see the dB meter jumping around when you run audio through it. If you do you are ready to record.
In order to record MIDI or Audio you must arm the tracks for recording by pressing the "R" located at the top right of each track.
If you recorded right, you should get spikey lines for audio and horizontal bars for MIDI to the right of the track.
If your audio outputs are setup correctly and the audio engine is turned on you should get sound from Sonar when played back.
If your MIDI tracks are setup right, when played back, you should get sound comming from your synthesizer.
I hope this sheads some light on the subject. It can get confusing sometimes, but don't get discouraged. If you have anyother questions, feel free to ask me. You can also check out some of the tutorals in the help section that came with Sonar.
Peace,
Brandon