Do You Hear It?

[eclimax13]

wondering if anyone else actually hears a difference between the dolby 5.1 and dolby true hd...when i switch back and forth, i can't really hear any difference in sound...only one i've been able to hear a difference on is house of flying daggers with uncompressed pcm...so can you hear a difference...with the dolby true hd or is it just so minimal?...im using a ps3 linear pcm to a denon avr 3806

[prerich]

Originally Posted by eclimax13

wondering if anyone else actually hears a difference between the dolby 5.1 and dolby true hd...when i switch back and forth, i can't really hear any difference in sound...only one i've been able to hear a difference on is house of flying daggers with uncompressed pcm...so can you hear a difference...with the dolby true hd or is it just so minimal?...im using a ps3 linear pcm to a denon avr 3806

Yes I did - it was big! It also depends on the mix, and what you are listening with. How discerning are your speakers?

[Halcro 1]

Well my halcro cant do the new codecs but it can do uncompressed which in all reality is just as good ... And its a huge difference in an action based movie

[prerich]

You should hear a difference (Nice LSi's by the way). Go to this website (I started to start a thread about it all by itself) you can test you hearing and see how well you discern things http://www.audiocheck.net/ Take the blind test. I did pretty good on them.

[eclimax13]

i can definitely hear differences in sound...better than most i think...but with this dolby 5.1 and dolby true hd i cant hear any...pcm i can...just not with the dolby stuff...yet my ps3 claims it can produce umcompressed dolby true hd

[callas01]

Originally Posted by prerich

You should hear a difference (Nice LSi's by the way). Go to this website (I started to start a thread about it all by itself) you can test you hearing and see how well you discern things http://www.audiocheck.net/ Take the blind test. I did pretty good on them.

That is a cool test, I was accurate at .5 10/10 was 6/10 on .2 and 4/10 on .1 so since my receiver only adjust the volume in .5 db I guess I am OK.

[callas01]

Originally Posted by eclimax13

i can definitely hear differences in sound...better than most i think...but with this dolby 5.1 and dolby true hd i cant hear any...pcm i can...just not with the dolby stuff...yet my ps3 claims it can produce umcompressed dolby true hd

your PS3 can only decode the DD THD and send it over as LPCM. So if you are not hearing a difference in DD and DD THD when sending bitstream, its because there is no difference, its all DD.

[eclimax13]

Originally Posted by callas01

your PS3 can only decode the DD THD and send it over as LPCM. So if you are not hearing a difference in DD and DD THD when sending bitstream, its because there is no difference, its all DD.

not sure what your saying....im sending over lpcm...you cant send it over bitstream as my receiver does not decode it...please explain more why im not hearing a difference in dd thd over lpcm

[crackinhedz]

have you turned Dynamic Range Control = Off yet?

you should set it to Off if you have not already.

[Santeria]

Originally Posted by crackinhedz

have you turned Dynamic Range Control = Off yet?

you should set it to Off if you have not already.

there should be a sticky on this i bet like 7 outta 10 people run into this.. lol

[eclimax13]

Originally Posted by crackinhedz

have you turned Dynamic Range Control = Off yet?

you should set it to Off if you have not already.

yes...turned off

[jsteinhauer]

I remember I was watching I am Legend. The menu is cumbersome. I ended up watching the whole movie, except the final sequence with lossy audio. I then discovered my error and switched to TrueHD. After hearing the difference for that few final minutes I was forced to sit and watch the whole thing over.

[zweet77]

Not to be nit picky but have you considered getting a seprate amp to run those lsi's that might make a difference but regardless you should notice a pretty big difference especially for action sequences

[Big Daddy]

Don't feel too bad. Even audio experts could not tell the difference between the two codecs in a double-blind test at Dolby Labs headquarters with high-end equipment.

Neither Geoff nor I could hear any differences between the original PCM track and the TrueHD version, which should be the case, as they’re bit-for-bit identical. The lossless coding process is analogous to “zipping” computer files—it’s simply a function of more efficient packing that loses nothing along the way. With movies, TrueHD typically provides a two- or three-to-one bitrate reduction compared to the original PCM source.

Next, we compared the original to the Dolby Digital Plus version (that codec is found on numerous BD titles, and like TrueHD, is fully backward compatible with regular Dolby Digital decoders). Even on this extremely high-end system, we couldn’t hear any difference between the uncompressed and the compressed. Then, we compared the higher bitrate (640 kbps) that is found on the Dolby Digital tracks on Blu-rays to the original. "Golden Ears" Morrison was able to hear the difference, but I, and most others in the room with us, did not. Each of us had our turn in the prime listening chair, and couldn’t know the origin of the clips or their order of presentation.

The shocker came when we compared the lower 448 kbps Dolby Digital DVD bitrate to the original. There was an audible difference, but it was only ever-so-slightly noticeable (and this is with a high end audio system in an acoustically controlled environment that is so far beyond what typical home theater systems are capable of resolving). There was just the slightest decrease in presence with the DD version, not exactly a softening of the sound, but just a tad less ambience and a similarly small tightening of the front soundstage’s depth. Quite a remarkable result, I thought, and I was highly impressed with how much fidelity can be packed into such a relatively small amount of bitspace. If I was doing actual scoring, I would have awarded a 4.8 grade to the results I heard – the audible difference was that subtle.

[eclimax13]

Originally Posted by zweet77

Not to be nit picky but have you considered getting a seprate amp to run those lsi's that might make a difference but regardless you should notice a pretty big difference especially for action sequences

you cant be serious...my avr3806 is pushing plenty....my audio setup is perfectly matched

[eclimax13]

Originally Posted by Big Daddy

Don't feel too bad. Even audio experts could not tell the difference between the two codecs in a double-blind test at Dolby Labs headquarters with high-end equipment.

this is what im talking about...the difference is so minute, one can hardly tell...which is why i dont believe most people on here when they say they hear a huge difference...from the dvd version to blu ray version yes..but not from the dolby digital to dolby true hd from the blu ray disc...like i said..the only time i really heard a difference is with uncompressed pcm

[DerrellB]

Unfortunately he has a point about the amp. Check out polks forum. I am a member there and have read many threads on powering lsi's and a receiver just doesnt cut it especially with them being 4 ohms. They dont wake up until a nice amp is pushing them. They are power hungry. I have heard them with and without an amp. And as every speaker, its makes a world of a difference when you have an amp. I dont think an avr does them justice. Just my opinion. As for the difference. I can hear it. True hd is more discrete. I have never been a fan of dd since dts came out. Dolby is so boomy to me. Once again just my opinion.

[eclimax13]

^^^im positive im pushing enough power to two 5 1/4" and 1 tweeter at 4 ohms..and while separates may be the better way to go...i still dont think its worth it at this point...once again..i hear a difference with uncompressed pcm..just not dolby true hd

[Canada]

Originally Posted by eclimax13

wondering if anyone else actually hears a difference between the dolby 5.1 and dolby true hd...when i switch back and forth, i can't really hear any difference in sound...only one i've been able to hear a difference on is house of flying daggers with uncompressed pcm...so can you hear a difference...with the dolby true hd or is it just so minimal?...im using a ps3 linear pcm to a denon avr 3806

Your kidding right the difference to me is night and day. I also think there is a huge difference between Dolby 5.1 and DTS 5.1

[Canada]

Also it depends on what movie you are watching the difference between DD and True HD on The Dark Knight is probably pretty huge like wise Dolby 5.1and PCM or True HD on Casino Royale. But the difference between Dolby 5.1 and PCM on Closer will likely be negligible.