Try this:

Artist and Source
Range - Artist: [,0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z, sort by Title
Tag Layer - Artist, sort by Title
Tag Layer - Album, sort by Year

I group some of my letters together like this:

Artist and Source
Range - Artist: [,0-9,a-c,d-f,g-i,j-l,m-o,p-s,t-v,w-z, sort by Title
Tag Layer - Artist, sort by Title
Tag Layer - Album, sort by Year
_________________________
Mark Cushman