The descriptive note comes from item B741 in :
Bowles, Garrett H.
Ernst Krenek : a bio-bibliography
Compiled by Garrett H. Bowles
New York: Greenwood Press, 1989
This is what Garrett H. Bowles had to say:
Concluded that both sonatas are chromatic and formally tight, Baroque appearances in thematic construction and overall style are apparent, and both are conservative in their use of special effects.
© Garrett H. Bowles
(c) 2013. Frank Greene. All rights reserved.