Schaier has released several albums under the title of Alvin Band including the Mario Kart concept album [r8613252] and Alvin Band's debut album [m1616072] that features the early "cutting room floor tracks" that are the Lady Portrait EP as bonus tracks.
His solo works tend to rely on dreamy synths, nostalgic lyrics, and ambitious a cappella melodies.
Schaier's other solo works can be found on his Bandcamp, and some very early works can be found on his Soundcloud, but right now he seems to be focusing on his work with Miniature Tigers.