Yamaha announced products that brought Dolby Atmos into home theaters. Products offered range from premium home cinema receivers and preamplifiers to mid-range home-theater-in-a-box (HTiB) packages. On June 4, 2018, Apple announced that tvOS 12 for AppleTV 4K would support Dolby Atmos when released in Fall 2018. You can turn your home theater into Atmos enabled one by adding more speakers to your 5.1 or 7.1 setup. For doing so, you may either install at least two ceiling speakers, or place at least two up-firing Dolby Atmos enabled speakers atop your front/rear speakers. Nowadays there is an option to buy an Atmos enabled soundbar. Despite being placed just a bit higher than ear-level, Dolby Atmos enabled speakers can reproduce overhead sound with the help of up-firing elements. They send sound waves into the ceiling, which reflects the waves down towards the listener. It contributes to the immersion of a listener into believing the reality of what is happening. This technology works best in a room that is high. There are two types of Dolby Atmos enabled speakers: Integrated speakers are traditional front-firing speakers combined with Dolby Atmos enabled up-firing speakers in one speaker cabinet. Add-on modules are Dolby Atmos enabled up-firing speakers placed into their own cabinet so that you simply add them on top or within of your current speakers. You can also mix overhead speakers with Dolby Atmos enabled ones. However, adding any new speakers (except for subwoofer and the central ones) must go in pairs to guarantee a balanced soundstage. For best home performance Dolby recommends having 4 or more Dolby Atmos enabled speakers that are away from the listener or using 4 or more overhead speakers with wide dispersion patterns (±45 degrees). Implementation and differences from commercial implementations The first movie to be released on Blu-ray with Dolby Atmos was Transformers: Age of Extinction. The first video game to use Dolby Atmos was Star Wars: Battlefront with a special agreement between EA and Dolby Laboratories. This game uses HDMI bit streaming from the PC to deliver Atmos audio to consumer Audio-Visual Receivers. Overwatch and Battlefield 1 for PC also have Atmos audio. On the Xbox One, Crackdown 3 and Gears of War 4 support Atmos. Dolby Atmos for Music, an audio-only iteration of the format was adopted by streaming music services Tidal (uses E-AC3) and Amazon Music in December 2019. Sennheiser launched a new soundbar with built-in