Dolby vs. DTS
Dolby vs. DTS
You'll often see these terms thrown around, and we've mentioned them in our receiver specs. They are what are known as surround sound codecs: software programs containing algorithms that mix the incoming sound and distributed evenly between your speakers, creating a certain type of effect. There are two main names in this particular area: Dolby, and DTS. There are significant differences when more speakers are added into the mix – Dolby uses something called object-based surround sound, and relies on height speakers for its industry-standard Atmos codec, while DTS (and its DTS:X codec) is a more user-friendly system that doesn't need height speakers to work. But the key thing to remember is that in the 5.1 arena, there are very few differences between them.
Oh, there may be slight differences depending on the speakers and the receiver in question, but overall, you shouldn't stress too much about this particular element. It's always a plus when you're able to get Dolby or DTS codecs in 5.1, but you are unlikely to be able to take advantage of the latest versions – not unless you upgrade the number of speakers you use! Don't let this deter you, however, from getting started with this particular branch of home theater. You'll have a lot of fun, even if you don't get the latest codec. And by the way, simply because you start with 5.1 doesn't mean you can't upgrade later, and take advantage of things like Dolby Atmos and DTS: X. For example, the Sony STR-DN1080 receiver is capable of utilising both of these.
Another savvy approach, especially for larger home theater rooms is using additional subwoofers - the so called 5.2 or 7.2 setups, where the number after the dot represents the system subwoofer(s). You might think that a regular 5.1 receiver might prevent you using a second subwoofer (due to all outs being already used up), but check at the back of the subwoofer speaker itself, as many of them have a line-level audio output, allowing for direct link to a second woofer. Larger format A/V receivers, such as 7.1, 7.2, 9.2 or 11.2 obviously make such extended setups simpler, and despite their higher speaker capacity, 7.2 (or higher) receivers are widely used in regular 5.1 surround setups, where the 'additional' speaker outputs used for separate zones - such as a 2.1 setup in another room for instance.