I've noticed a gradual shift of preferred key signatures in JNew's songs. Most of the songs on MEM are in C-flat, Ys is a mixture, and HOOM has a ton of songs in D (I haven't even checked them all, but consistent enough that it wouldn't surprise me if more songs were in that key). Take a look:
Sprout & the Bean, Book of Right-On, Sadie, Cassiopeia, Erin, What We Have Known, and Clam Crab Cockle Cowrie are all in C-flat.
Have One On Me, Baby Birch, In California, Does Not Suffice, Soft As Chalk - these are the only ones I've checked, but I wouldn't be surprised if more from HOOM are in D as well (Inflammatory Writ and This Side of the Blue are as well, but I think that's unrelated).
So I wonder if THAT's why her voice sounds different, aside from the nodes and other modifications?