Which composers other than Henry Cowell wrote piano pieces that involve plucking and sweeping along strings?
Here’s a bit of what I found on Wikipedia: Although few composers other than Cowell have used the term “string piano” to describe their use of the piano strings (George Crumb, for instance, refers to the “resources of the ‘extended piano'”[4]), such techniques were increasingly called upon during the second half of the 20th century, eventually becoming part of the general vocabulary of contemporary pianistic writing and performance. Many composers have used such “inside-the-piano” techniques sporadically, as special effects; a few have made more substantial use of them, such as Crumb (e.g., Makrokosmos, vols. 1 and 2 [1972; 1973]), Halim El-Dabh, Sofia Gubaidulina (e.g., Dancer on a Tightrope [1993]), Mauricio Kagel (e.g., Trio in drei Sätzen [1984–85]), Carl Orff (e.g., Antigonæ [1949]), Toru Takemitsu (e.g., Corona for Pianists [1962]), and David Tudor.
