I often think writing at the piano can lead you down certain paths, that pure desk work wouldn't and I don't always think that's a good thing. If you're a pianist to any level, I think you can endup using pianistic devices that sound fine but don't transfer well to other instruments. Part writing often suffers, as can chord voicing.
As I don't have pitch I need the piano in the corner to refer to, but use it like Feldman suggested, as a guide, not as a means of transport. Also it's intresting to note that Ravel's piano music is "pianistic" in a way the Stravinsky's isn't. The two piano version of The Rite is akward, and like listening in black and white, while the Noble & Sentimental waltzes by Ravel work fantasically well on the piano, for which they were first composed.
Ives too somtimes used the piano and then orchestrated after that, and sometimes the other way, fragments of orchestral works made it back into piano pieces.
As I don't have pitch I need the piano in the corner to refer to, but use it like Feldman suggested, as a guide, not as a means of transport. Also it's intresting to note that Ravel's piano music is "pianistic" in a way the Stravinsky's isn't. The two piano version of The Rite is akward, and like listening in black and white, while the Noble & Sentimental waltzes by Ravel work fantasically well on the piano, for which they were first composed.
Ives too somtimes used the piano and then orchestrated after that, and sometimes the other way, fragments of orchestral works made it back into piano pieces.