Matt
 
Sidroe I can't find what you're talking about in the options menu... anything more specific?
 

Click the wrench icon in the upper left corner and if you're using a full version of Kontakt you'll find a button to open options, where you see several tabs and one of them allows you to adjust gain (-6dB, 0dB, +6dB, etc.)

Got it.  Thanks.

John
Not sure if this has been mentioned but each instrument has  tool header and to the right is a volume control just below the meter. 

 
 
I often setup my Kontakt with 16 outs in the mixer of Kontakt. Then I set each instrument to go to its own mixer channel and that is set to its own Sonar track. 

Doesn't work if you adjust the fader in Sonar. Sonar's fader is tied to this volume control and will reset the control when you press Play. The Output section, however, is not controlled by Sonar (be default).
 
Regards,
Dan
 

FWIW Matt, I never set the volume of soft synths, and particularly Kontakt, from the fader on the MIDI track. For me it's just too easy to foul up. Instead, I turn the fader all the way down, right-click on the MIDI fader and choose "disable control" which causes the fader to stop adjusting the volume of it's associated MIDI instrument. At that point you can just set the volume of the instrument in K5 and it will stay where you put it. It will start affecting the instrument again if you move the fader (you'll need to "disable" again if you do), but at long as you don't click on the fader again it shouldn't cause you problems.
 
Good luck,
Dean

That's good to know, I didn't know that you could disable the volume control.  Though for me I prefer to do it via midi because all my Kontakt instances run on external computers so to adjust the volume I would have to click over to remote desktop and then click on the correct computer and then click on the right instance of Kontakt and then find the sample.  Having it all right there in Sonar is better for me personally.

I was having a similar Kontakt problem because 127 apparently defaults Kontakt to 0 db.  Moving the Kontakt slider did not good because the controller would reset it.  This is good news.

Try this: in Kontakt plugin, click the wrench on the instrument(s) you want to have responding louder. Then click "Instrument Options." For MIDI controller #7 range, select negative infinity to 0 dB, or negative infinity to +6 dB.

I just now stumbled across this.  I found content from some long ago forum post, that I have used ever since, to alter the behavior of most/all Native Instruments plugins, like Kontakt, Battery, FM8, etc... with regard to the volume fader within each synth getting reset after I would change it.  QUITE frustrating.
 
SO, what I learned to do, is when I insert an NI plugin, like Kontakt, for each instrument I load, I immediately click on its 'wrench' and click on Instrument Options, then click on Controller, and then remove the check for the box for option: Accept Standard Controllers for Volume and Pan.  This seems to stop that behavior or resetting the instrument's volume setting in Kontakt.
 
Give it a try - if the altered behavior is to your liking, you can save the instrument - (whenever I do this, like if I do this change and/or adjust key switches), I save the instrument with a new name in the same folder as the original, usually adding my name to the front, like saving 'String Ensemble' as 'Bob's String Ensemble').
 
Hope the above helps - I also tend to do this with Battery and FM8, in addition to Kontakt, as these are likely my most used NI plugins, Kontat for sure being number one, for live performance.  (I tend to use EastWest Composer Cloud Plus libraries for studio work, 24-bit samples with 5 mic positions, and well over 12,000 instruments).
 
Bob Bone