Corporate music is more defined by its ethic, rather than by any particularities of rhythm, tonality, or instrumentation. Imagine, if you will, that you’re a businessperson that needs music for when someone is on hold with your phone system. You will naturally want music that is inoffensive, familiar, and easy to digest. Put another way, you will want music that will appeal to a wide swath of the population or, sparing that, will not put people off.
For a piece of music to meet these criteria, it will need to be a piece of music that does not take risks. Generally speaking, the lyrical content will be removed, the rhythm will be slowed down, and the instruments chosen to play that music will be soft in their timbre and tonality. Because of these choices, the piece of corporate music will be familiar enough to its listener without being definable enough to leave any kind of lasting impression, positive, or negative.