The HD Digital Radio Alliance, a consortium of leading radio broadcasters pushing the rollout of HD digital radio, Tuesday announced that 18 new markets will begin HD2 multicast programming this fall,
marking the third wave of stations rolling out side channels under the Alliance's format-selection program. The new markets will launch 140 additional HD2 channels and bring the total number of
markets served by HD2 multicast programming to 68, all of which are in the top 100 markets.
