Using mc.mixdown for multiple outputs

I am trying to create a Binaural Beats application with generative music playing in the background. I am really strugging to get these to play together - and sound good. The patch will have options of differet binaural beat settings using bpatcher and offsets but currently trying to get both the binaural beat signals and the generative music to play together isnt working. I am very new to Max so don't have much experience.

This is the current patch - both play together but do not sound good together

This is just the generative music patch on its own

This is the Binaural Beats Patch on its own - obviously not in full

Any help would be so appreciated!