The recent rumor on the HTC M9 says that it will have a Dolby Powered Audio technology. This ensure that the HTC M9 is focused on providing the best audio experience. The dolby technology was first experienced in the Amazon Fire HDX 8.9” tablet, which had a real good review and now on the HTC M9.
M9 will have Dolby-powered Audio technology, this rumor is True：）
— @upleaks (@upleaks) February 23, 2015
HTC M9 will be the first HTC smartphone with this dolby audio technology and hence it ensures that rest all the HTC flagship phone will carry the same audio technology. This rumor was confirmed by upleaks.
Stay Tuned for more updates!