Hi Jack-So I think this will be a solution: If you open up the Alchemy plugin you can select the "Advanced" Tab (the default is the "Browse" Tab and the other option is "Simple"). From there you can see that the in the upper left corner of the window "Global" is highlighted light gray. One at a time I clicked on the Sources below "Global" (A, B, C, D) and I played notes go see what was causing the side chain to occur-as you hold down a note you'll see that certain qualities of the patch shift (you'll see a white dot traveling along the orange line around the Volume knob of the Oscillator for example). When you see these shifts happening around knobs you can click on the knob (such as the Volume knob mentioned above) and the Modulation menu on the middle left of the window should change to the knob you selected. In this menu you can turn the Target buttons from On (blue) to off (it will still say On but the button will now be gray). If you do this with through all of the Sources (A, B, C, and D) that will get rid of the side chain.
Specifically:
Click on Advanced Tab
Click on A
Click on Vol Knob under Oscillator; Turn off LFO2 under Modulation menu
Click on Sym Knob under Oscillator; Turn off LFO1 under Modulation menu
Click on B
Click on the Vol Knob just to the right of where you clicked; Turn off LFO2 under Modulation Menu
Click on C
Click on Vol Knob under Oscillator; Turn off LFO2 under Modulation menu
Click on Sym Knob under Oscillator; Turn off LFO1 under Modulation menu
Click D
Click on Vol Knob under Oscillator; Turn off LFO2 under Modulation menu
Side Chain should now be "off." I hope that works for you!