Author Topic: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)  (Read 652 times)

Offline desray

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Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« on: May 18, 2020, 11:29 »
This is NOT a trick question...but I will like to have a show of hands how many prefer will actually allow a Dolby TrueHD sound mix (NOT Dolby Atmos) to be upmixed with Dolby’s very own Dolby Surround Upmixer (DSU) so as to take advantage of the height/ceiling speakers.

There is no doubt that DSU is good at upmixing a normal Dolby Digital 5.1 or DD+ sound mix and get quite good results. But I just discovered (at least from my perspective) that upmixing a Dolby TrueHD sound mix with DSU will in fact cause your bass to weaken and screw up the high frequency range. Who has this experience?

Over the weekend, I played Toby McGuire’s Spider-Man trilogy (blur-ray version) and it comes with Dolby TrueHD (lossless) and to my dismay, sometimes, the upmixing (DSU) can screw up the whole HT experience...Give it a try and comment here.


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Offline rayleh

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #1 on: May 18, 2020, 12:15 »
In my layman term; DTS Neural X seems to play louder compare to DD+. 

Offline desray

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #2 on: May 18, 2020, 12:27 »
In my layman term; DTS Neural X seems to play louder compare to DD+. 

Not talking about loudness level per se...but rather the overall SQ, particularly the overall soundstage and LFE kind of screwy based on my experience. I just wonder anyone here experience it as well?

Online sevenz

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #3 on: May 18, 2020, 12:50 »
Interested to know everyone's experience too on this.

My own impressions are that when I use upmixing for non-atmos/dtsX formats, using either dsu or neuralX, I didn't like the overall sound quality n bass compared to original format (e.g.Dolby true hd or DTS master) although it gives some height/overhead effect.

More often, I find the sq and esp bass is better when not "upmixed"
« Last Edit: May 18, 2020, 13:05 by sevenz »

Offline ronildoq

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #4 on: May 18, 2020, 13:11 »
I’ve tried playing dolby truehd content on neural X, sounded horrible. Totally off.

Playing trued on dolby upmixer sounds good to me

Between the two, I always play dts hd Ma without any upscaling. No DSU engaged. I’m not a fan of neural X. Some may like this. YMMV. But don’t get me wrong, I love dtsx and dts hd Ma.

But for dolby truehd, I always use the dolby upmixer . Haven’t tried dolby digital upmixed. So far I don’t have that many content, most of the content I have is either in truedhd or Atmos

Offline desray

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #5 on: May 18, 2020, 13:58 »
I’ve tried playing dolby truehd content on neural X, sounded horrible. Totally off.

Playing trued on dolby upmixer sounds good to me

Between the two, I always play dts hd Ma without any upscaling. No DSU engaged. I’m not a fan of neural X. Some may like this. YMMV. But don’t get me wrong, I love dtsx and dts hd Ma.

But for dolby truehd, I always use the dolby upmixer . Haven’t tried dolby digital upmixed. So far I don’t have that many content, most of the content I have is either in truedhd or Atmos

Interesting...can you try Sam Raimi's Spiderman bluray...play Dolby TrueHD + DSU. :)

Offline desray

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #6 on: May 18, 2020, 14:01 »
Interested to know everyone's experience too on this.

My own impressions are that when I use upmixing for non-atmos/dtsX formats, using either dsu or neuralX, I didn't like the overall sound quality n bass compared to original format (e.g.Dolby true hd or DTS master) although it gives some height/overhead effect.

More often, I find the sq and esp bass is better when not "upmixed"

I kinda agreed with you that sound mixing in Dolby True HD or DTS-HD MSTR, it is actually better to use the native format instead of upmixing using the DSP mode. The DSU and DTS Neural:X is a hit or miss...but I have to say there are some sources (bluray titles) that just simply have a bad mix. :P

Offline ronildoq

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #7 on: May 19, 2020, 12:10 »
Interesting...can you try Sam Raimi's Spiderman bluray...play Dolby TrueHD + DSU. :)

Yea, I can Check it when I watch it. Yes I think Sevenz made a good point and is right, sometimes it’s better to use just the native formats without any upmix

Offline desray

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Re: Dolby TrueHD (good) vs Dolby TrueHD + DSU (bad)
« Reply #8 on: May 19, 2020, 14:15 »
Yea, I can Check it when I watch it. Yes I think Sevenz made a good point and is right, sometimes it’s better to use just the native formats without any upmix
Remember to cycle between Dolby TrueHD (native) and Dolby TrueHD with DSU apply.


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