Hello,
A couple of tips that may help-
1. Make sure that your sax is in tune and tuned to the same tuning as PitchFactor (usually 440.) This will help with the pitch tracking.
2. Make sure that the PitchFactor is getting plenty of signal at the input. This will help the pitch tracking as well. You may want to experiment with cranking the output level of your mixer into the PitchFactor to see if your issue is improved.
Let us know if these things help!
