Tomorrow's Modern Boxes is the second solo album by Thom Yorke of the English alternative rock band Radiohead, released on 26 September 2014. It was produced by Radiohead producer Nigel Godrich, with artwork by Radiohead artist Stanley Donwood. The album blends Yorke's vocals and piano playing with electronic beats and textures.
Thom Yorke sung the vocals and played the piano for Tomorrow's Modern Boxes, but was not necessarily responsible for blending them with the electronic beats and textures.
Although Thom Yorke did the vocals and piano, the context doesn't delineate whether he was responsible for mixing these things with the electronic beats and texture, and therefore the statement is definitely correct. (He both did the vocals and piano, and did not necessarily do the blending).