Hi Q, 

 I need to know some more information before I can attempt to assist you. I often find that horn players may have a completely different experience than guitar or synth players with certain algorithms because of a particular mic that's being utilized. What is your current setup going into the pedal? Is your signal is hot enough going into the H9? Does the green light on your pedal 'stay green' all the time? Are you using a mic preamp you can adjust? Let me know…

-CC