One of the most vocal critics of abstract expressionism at the time was New York Times art critic John Canaday. Meyer Schapiro and Leo Steinberg along with Clement Greenberg and Harold Rosenberg were important art historians of the post-war era who voiced support for abstract expressionism.
Keyboards should be of appropriate size and key-spacing to accommodate most users. Generally, the horizontal spacing between the centers of two keys should be 0.71-0.75 inches (18-19 mm) and the vertical spacing should be between 0.71-0.82 inches (18-21 mm) (Figure 9).
The other three types are spinet, console and studio. Spinet pianos are less than 36 inches tall. Console pianos are 40 to 44 inches high. Studio pianos are 45 to 50 inches high. The height of the piano makes a major difference in the quality of sound the piano produces.