DD 2.0 vs DD 5.1 vs DD 7.1?

Question

I dont mean to sound stupid here, but what is the difference in the DD levels?

I know the basic answer...higer is better sound quality, but can someone explain it to where i can understand?

Answer 1

how many speakers you are using

2.0 stereo no subwoofer

5.1 five speaker surround with subwoofer(front left, right and center plus surrounds

7.1 seven speaker surround plus subwoofer(5.1 plus rear surrounds)

Answer 2

Well, I'm not sure what DD stands for, but in audio/home theater sound systems, 2.0 is considered to be normal stereo, as when you have a receiver that runs only 2 speakers, one right and one left. 5.1 is the starting point for home theater, and it both describes the speaker count, and the coding and decoding of the audio & video storage media. The number 5.1 refers to there being 5 speakers, and one more (thats the ".1") that is a subwoofer.

In the case of 7.1, its the same with two more channels of sound, and thus, two more speakers to transmit them.

A look through the electronics on amazon.com would provide you with some good examples of such equipment.

Most movies, especially on DVD, are recorded in at least 5.1 sound, so, if you play them on a 2.0 audio system, you won't hear as much as there is on the media.

Answer 3

The DD is Dolby Digital, the basic standard for DVD audio playback. DD 2.0 is a bit of a dodgy term, as it rarely used for stereo. The first number is how many speakers you use, and the .1 is for the extra speaker, called a subwoofer. The subwoofer makes all the deep bass sounds (explosions, thunder etc).

So 2.0 is basic stereo.

5.1 is your standard surround sound format. It comprises the standard two stereo speakers either side of your tv, a centre channel (usually abover or below the tv) and two surround speakers (usually just behind you, much as the front stereo speakers are placed). This gives and excellent overall sound, and is reasonably simple to set up.

7.1 is the same as 5.1, with the addition of two extra surround speakers. It helps to smooth the transition of sound from front to back. I wouldn't worry about aiming this high. I would humbly suggest that 5.1 would suit you fine.

Hope this helps