Original sentence: A small, but increasing number of music radio stations and stations that carry drama on DAB in the UK are being broadcast in mono when some believe that they should be in stereo, though the majority of UK digital radios have a single speaker.These stations are, however, generally available in stereo on the digital TV platforms, where capacity constraints are not such a concern
Edited sentence: A large and increasing number of music radio stations and stations that carry drama on DAB in the UK are being broadcast in mono when they should be in stereo.These stations are virtually all available in stereo on the digital TV platforms, however, as well as being stereo on FM