DTS VS DOLBY DIGITAL!!

Filed under: movies, music, technology — nesh September 23, 2007 @ 8:27 pm

  When my dad purchased a complete sony home theater system with the big screen tv,i turned into a sound freak with a lust for good quality dvd’s with exceptional sound.Even though sony is not considered to be  the best sound brand,i would consider it to be satisfactory because the details of the sound is considerably good.I would often play around with the audio menus which is normally made up of two major types of sounds namely the dolby digital and dts.

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 Naturally, DTS advocates are in the winning position because they can say that they have heard a difference. The poor old Dolby Digital defenders look like they have cloth ears. But before we delve too deeply into the debate, let’s look at what the two formats are, and where they came from.

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Neither was developed for DVD. Both were intended to provide 5.1 discrete channels of digital sound cinemas on 35mm film while remaining fully compatible with standard equipment. Dolby placed its digitalsound track as optical marking on the edge of the film, between the sprocket holes. This left Dolby with a bandwidth of around 400 kilobits per second. Six channels of uncompressed CD-quality digital audio requires ten times this capacity, so Dolby developed AC-3, an MPEG-type ‘lossy’ audio compression system.

 

Dolby Digital’s first appearance was in 1992’s Batman Returns, slightly pipping Jurassic Park’s 1993 premiering of DTS.     The DTS sound track isn’t on the film at all, but on a separate CD, synchronised with SMPTE time code markings on the film. Since CDs output around 1,400 kilobits per second of digital audio, DTS was designed to use this bandwidth (actually, due to different error correction techniques, full DTS produces 1,536 kilobits per second). This had the additional advantage of allowing easier distribution of other-language sound tracks, without the expense of having to prepare new film prints with dubbed dialogue. In their DVD incarnations, Dolby Digital and DTS are similar systems. Both use a lossy compression system and in their 5.1 varieties, each offers the DVD producer two bit rates. Most Dolby Digital DVDs use 384kb/s but some use 448kb/s, which Dolby says is the maximum possible on a DVD. DTS can come at the original rate of 1536kb/s or the half-rate of 768kb/s (eg. Gladiator, Santana: Supernatural Live and all of Columbia TriStar Superbit DVDs).

So which sounds better?

That’s where the controversy arises. Dolby and DTS are only of slight help in this. They have been sniping at each other for a while. DTS says that of course it sounds better because its compression isn’t as lossy as Dolby’s. Dolby says that you can’t draw any conclusions from the raw compression figures because it all depends on how well the codec (compression/decompression system) is designed. This makes sense. Sony’s ATRAC3 sounds better than MP3 at similar compression rates. Still, we are talking about a big difference in compression levels here.

Dolby also says that the DTS 0.1 channel rolls off the bass by a few dB at the top end of the range. DTS counters that Dolby Digital’s 0.1 channel imparts a huge phase shift due to its brick-wall low pass filter. Dolby says that the half-rate DTS ‘maxes out at 15kHz’ (later amended to a 3dB attenuation at 15kHz) while 384kb/s Dolby goes to 18kHz and 448kHz reaches 20kHz. DTS responds that the higher level Dolby system mixes the channels above 15kHz, and the lower level one as low as 10kHz.

Dolby says that it organised listening tests with professionals who preferred its system. DTS says that the tests ought to be independently conducted.

Dolby says DTS tracks often play louder than Dolby Digital ones due to the latter’s dialogue normalisation feature (which is often set to reduce the playback level by 4dB) and an alleged 0.6dB boost in DTS’s encoding of broadband material. DTS says that there is no 0.6dB boost.

And so on.

Reviewer opinions are varied, however the range is from DTS-is-better to they’re-pretty-much-the-same. The more carefully conducted the trials, the greater the attention paid to removing non-codec related variables, the more equivocal the findings.

As for me, I find that there is very little, if any, difference. If you hear a DTS sound track sounding obviously better than a Dolby Digital one, you can be fairly confident that a different mix was used. For identically sourced audio, changing from Brand A of speakers to Brand B will change the sound a lot more than changing from the Dolby Digital to the DTS audio track.

Rap outclasses rock!

Filed under: music — nesh June 24, 2007 @ 9:27 pm

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I know rock songs can go deep but they don’t talk about their lives or real expierences some do but not all of them, Green Day “American Idiot”, nuff said, “I walk a lonely road” the kinda of song that gets stuck in your head but it’s not true. Most rap songs they rap about things they really do. Rap comes from the heart. But aside from the songs some rock people look scary some of them put on make-up (and they are men) it’s scary they pain their faces white eyes black it’s messed up.

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People think rap is meaningles but those are the only ones you hear on the Radio dont be ignorant. Verse from Eminems song “Loose yourself”  “life is so hard its getting even harder trying to feed and water my seed plus between being a pre-Madona and raising
Two daughters this life has gotten to me I must be like a snell and formulate a plot or end up in jail or shot success is my only option failures not, moma love you but this trail has got to go I cannot grow old in Salems lot so here I go as my shot feet fail me not this may be the only oppurtunity that I Got.”  This is a very good verse telling what he felt before he became Eminem , now this takes skill , and screaming doesnt.

Rap takes skill; in rock, all they do is just bash their instruments, but in rap they express their lives. Also, in rock music, they just make up songs.

Rap foreva!!

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Guitar is is my passion…I just dont know how to use the thing!

Filed under: music — nesh April 27, 2007 @ 7:13 pm

How dumb could i be, i assumed chords were the strings on the guitar…that was until i met my friend Andrew Raj who is also a blogger and my classmate to….he thought me alot of things regarding the guitar….And yea i found out that chords are a combination of a few notes…!! Now i can actually play up two 6 chords courtesy of andrew…thanx man.

In fact, i have improved so much that i can even tune my guitar now.How cool is that???  Now i am capable of playin simple notes,chords and tune my guitar….cheap guitar only la….kapok!!! And yea,u guys may be wondering how could a beginner tune his own guitar …..I “main tipu” la…..I use a guitar tuner created by the one and only Andrew Raj.If you guys are interested to download his digital tuner,you can do so by visiting  adwraj.com