Plenty of problems here...starting with the placement of that Row30. NEVER put a power device anywhere near an audio module. This is the easiest way for noise to get into your audio path. Also, consider getting a different power brick; inputting 19V into a module whose max is 20V is probably overtaxing the Row30.
EDIT: Got interrupted...also, you might want to add a ferrite to the DC line into the Row30 if it doesn't have one already. Cheap switching supplies such as ones found in OEM bricks often spew garbage down the DC line. In a lot of devices, this isn't an issue...but with a modular synth, you can have so many different analog and digital circuits crammed together in a tiny box that, once some RF or other such crud gets in, it'll interfere with loads of these and numerous noise generation points can emerge.
One other suggestion might be to get rid of the brick altogether. On my AE system, I use a Tektronix LINEAR supply. These aren't subject to generating anywhere near the amount of crud a cheap switching supply typically puts out. The unit I use is a PS282, which is more than capable of powering that 160-space mutha with ZERO need for ferrites, etc etc. And mine was even calibrated by the seller (Valuetronics, up in the Chicago burbs) prior to sale, so it's 100% in factory spec...for only $100-ish. Plus, unlike a lot of linear supplies, this TEK is portable...it's about the size of a lunchbox, and even has a carry handle for convenience! With this thing on the AE, all of the VCOs stand right at attention, there's little to nothing atypical as far as noise goes, and the stability is...well, the ripple scopes out at something ridiculously low, essentially negligible, so that modular runs rock-solid.