Pcm 2.0 Vs Dolby Digital 5.1
- #i
I'm non sure exactly what "PCM" means, simply when I choose that setting instead of "Dolby Digital", I get much better results. The sound is louder and the surround sound is more, well, surround. I've been having a acquit of a time trying to figure out the settings and getting 5.one to work right. The principal issue is but getting audio out some of the speakers. "PCM" has given the overall best-sounding result and gives audio out of all the speakers. But with "Dolby Digital" I don't get audio from the two surround speakers. So which ane is normally better? And what's the actual difference between "PCM" and "Dolby Digital"?
Deleted member 39241
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- #2
Dolby Digital is compressed and so PCM is better. Dolby True HD, DTS HD MA, Atmos and DTS X are also lossless, so should be similar quality to PCM.
If the source audio is stereo, it should simply be coming from your front end left and right speakers unless y'all use an up mixer.
What amp practise yous have, and what speaker set up?
- #three
PCM is the originally recorded digital audio (pulse coded modulation) - all A/V sound is PCM to showtime with, and all A/V audio will end upwardly as PCM before hit the DAC. Dolby Digital is lossily compressed PCM. It enables more audio to be stored in the same space and more audio to be transmitted across the same bandwidth. Still, as said, DD is lossy. Better therefore is Dolby TrueHD, which is losslessly compressed and hence admittedly identical to the original PCM once decompressed.
The book and performance (Dolby TrueHD) ought to be identical, however, since the decompression, etc. is being done in a different box, if your equipment has not been calibrated, there may well be differences in the level, or dependent upon the equipment quality fifty-fifty differences in the functioning.
- #4
It depends upon where the PCM digital information is derrived from and how information technology was encoded. Information technology tin can technically be better past mode of it allowing for higher bitrates, but setting a source device to output PCM rather than assuasive it to bitstream the formats the content is encoded with simply results in the source converting other formats to PCM information. The audio you go resulting PCM data in such instances will be no improve than the sound you'd accept gotten had you bitstreamed the encoded audio the PCM information was derrived from.
In some instances, setting a device to output PCM every bit opposed to having bitstream the actual format the sound was encoded with can issue in you getting audio that is less desirable. Choosing the PCM digital output option onboard a TV for example volition in most instances result in v.i Dolby and DTS encoded formats existence mixed down to only ii aqueduct PCM. Again, the resulting PCM would just exist the DTS or Dolby Digital audio decoded by the TV and mixed downso no improvwement over what you'd have gotten had you bitstreamed the original format.
The simply time that PCM may resilt in better quality is in instances where yous get the option of either a discrete PCM soundtrack or a Dolby encoded soundtrack. Even so, the PCM selection will take to be encoded in a style than really means that the lossless uncompressed PCM data includes as much if non more data than the lossy compressed Dolby Digital audio.
Besides note that your AV receiver decodes incoming formatted audio and this results in PCM data. It is this PCM data that is processed by the AV receiver and converted to an counterpart point past its DAC.
Streaming audio already encoded as Dolby Digital will not issue in better audio if configuring the source device to decode it and output information technology as PCM. All yous've done is modify the device doing the decoding from the AV receiver to the source device.
You may find this informative:
PCM vs. Bitstream
Which is best, sending PCM or bitstream from the player to the A/5 receiver? I accept reviewed many posts in the A/V forums and other areas that don't seem to give a definitive answer. I have an Onkyo TX-SR608 AVR and an LG Blu-ray player capable of decoding DTS and Dolby lossless audio. I view...
www.soundandvision.com
and:
PCM isn't technically an audio format and more a manner of conveying digital information. It can convey data associated with audio that has a higher bitrate and sample rate than lossy formats, but but if the media yous are accessing the audio from includes a PCM encoded soundtrack encoded with the additional information not present with the lossy compressed Dolby Digital variant of that aforementioned soundtrack. Converting the Dolby Dogital variant using the source device will non result in meliorate audio.
You may also detect this thread of interest:
An Attempt to Explain High Definition Audio
An Attempt to Explain High Definition Sound & Some other Stuff High Definition Sound Blu-Ray brings with it new loftier definition sound formats to match its high quality pictures and video. Sound can be stored on a disc in a number of means: • Lossless Uncompressed (no data lost)...
world wide web.avforums.com
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- #5
Information technology's disruptive that there'southward a few dissimilar things that have the give-and-take "Dolby" in them. This has all been frustrating. Fifty-fifty when the receiver display shows "Dolby D five.1", I however don't get audio from the far left & right surround speakers.
- #6
The devices are: Telly - Vizio M507-G1 (A 50-inch LED TV). So does PCM really give yous real five.one surround sound, or is just taking a stereo-only signal and sending it to all the speakers?
Receiver - Onkyo HT-S3300 (5.1 surround sound)
Cable Box - Unsure, it just says "technicolor" on it.
Deleted fellow member 39241
Guest
- #7
Are yous certain? Yous might be l listening to a soundtrack where there is non much audio mixed for the surround speakers. Exercise the exam tones play?
If the source sound is PCM 5.1 then information technology is truthful surround audio. PCM can besides be stereo though, 2.0.
- #8
Well this receiver doesn't really have test tones. There's a menu setting called Level Cal where you can manually set each speaker anywhere from -12 dB to +12 dB and it plays a white noise type sound rather than test tones. The white racket is very serenity and hard to estimate fifty-fifty at +12 dB.
Deleted member 39241
Guest
- #9
White dissonance counts as test tones. Put your ear correct against the speaker to see if the white dissonance is emitting from it.
- #ten
Annotation that if you lot've cnfigured your Vizio Idiot box to output PCM via its digital audio output then you'll simply ever exist getting ii aqueduct PCM via that Tv. I'yard non familiar with yout cable TV box or how TV channels deal with the audio encoding where you lot are, but information technology is common practice to limit the SD channels to 2 channel PCM and you'd ordinarilly only go Dolby Digital via the Hd channels. It should be noted that just because the audio is Dolby Digital isn't to say information technology volition be five.1 in nature! Dolby Digital can be stereo or 5.i and not all TV programs will include anything more than than a 2.0 stereo soundtrack. Even if the channel you are watching uses Dolby Digital, non all of the programs aired via that channel will be 5.1 in nature!
- #11
Yes, I tin can hear white racket from all the speakers. So I know they're hooked up and working right.
And so I guess even though the receiver may brandish "Dolby D 5.one", it's possible that yous're not really getting 5.1?
Here'southward something aggravating I had happen. Last dark watching the bear witness "The Voice" on local over-the-air TV channel eight, I become no surround audio. But then when I switch to that same channel on the cablevision box, so I get surround sound out all the speakers, with the aforementioned rock band yet playing. So what the heck? Can y'all see my frustration?
Deleted member 39241
Guest
- #12
I tin can. I think the issue might be the upmixer. It is set to come on with some devices and not others?
I am non familiar with your AVR, simply there should be a mode to cycle through the upmixing options when stereo audio is playing to create pseudo v.one.
- #13
I'm not sure what an upmixer is, but the Receiver is an Onkyo HT-R380.
- #14
Upmixing is processing applied to a source that creates boosted pseudo audio channels. Such upmixing tin can be used to create audio from stereo sources that would be output via the other speakers present within a setup. Examples of this would be Pro Logic, Neo, Dolby Environs, Neural or Neural:Ten. Almost AV receivers too take an all aqueduct stereo mode that portrays ii channel stereo sources via all of the speakers present. Note that such a mode tin exist in result for dissimilar sources and will not necessarily be activated for all of the receivers sources.
Deleted member 39241
Guest
- #xv
Upmixing is where the AVR takes a stereo soundtrack and intelligently processes it to send sound to all of the continued speakers to create a pseudo environs upshot. Peradventure you could read the transmission?
- #sixteen
Well, the transmission on this matter basically sucks. Information technology just doesn't explain affair'due south well at all.
- #18
If you've configured your Boob tube to output PCM then the output will exist mixed downward to just 2 channels of PCM data. This is due to the inability of conventional ARC or S/PDIF optical to convey more than merely ii channels of PCM data. Your Tv would be decoding the formats it can handle and downmixing the resulting multichannel PCM data into simply 2 channels.
Regardless of whether you are bitstreaming an audio format or not, the AV receiver can but process the sound and input it into its DAC if it firct decodes it. Later the receiver decodes it the betoken is PCM in nature. The only exception to this would be if the receiver is receiving SACD and if the receiver has a DAC that tin handle the associated SACD point straight.
DACs practise not and cannot handled undecoded Dolby formatted audio.
- #nineteen
Im having an issue that really is driving me nuts! using an lg soundbar and setting the goggle box output to Dolby digital is resulting in a massively boosted betoken on the soundbar that means I barely have the volume upwardly which in contrast means the soundbar is extremely loud at around one-half volume. Strange as I have never had this effect with av receivers.
Selecting pcm output results in what i would consider a more balanced output.
What is happening here, why is the Dolby digital option so much louder?
Kit is Samsung mu7000 with lg Sl8yg
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- #20
If outputting PCM from a TV and then it will exist stereo and if the source was multichannel in nature than the PCM output from the TV volition exist the multichannel audio mixed down into merely 2 channels. The LFE channel included with multichannel formats isn't still mixed down into the ii channel PCM point and this could be why yous are nether the impression that the PCM sound is quieter? Dialogue normalisation (Dialnorm) alters the dynamic range associated with the DD audio beingness played.
- #21
Thank you Dante, the reason information technology seems odd to me is that the soundbar is pushing into compression at about one-half book. Information technology'southward as if the Samsung tv is boosting the Dolby indicate. On the LG soundbar effectually 10/40 is the comfy listening level, information technology just doesn't seem right to me. It'south worse on tv content, YouTube and Netflix isn't quite as bad but is withal seems as if the book to signal ratio isn't correct. I would exist interested to see if I get the aforementioned result from an LG tv.
Example. PCM results in a listening level at about twenty (halfway) on the soundbar which when pushed to max book nosotros are reaching compression.
Dolby digital results in a comfy listening level of well-nigh 10 at 15 we are running out of headroom. These findings are similar to the comment above which states DD results in a louder wider soundstage, but headroom is significantly reduced on my organisation.
Edit. After some further reading I'm wondering if this is due to the five.1 bespeak being output through a iii.1 organization.
Edit 2. After playing effectually some more than information technology seems the LG is applying the boost only in movie mode, standard way results in far less boost betwixt DD and pcm.
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Deleted member 882605
Invitee
- #23
Hi all
Promise someone can help.
So I have a samsung ue55ru7400 television set and a very old Samsung sound bar the hw-f550
This soundbar is only two.1, at present on my TV the audio output whilst in YouTube is PCM and when I sentinel a bluray or netflix the TV switches automatically to dolby digital
So judging my the comments in a higher place is that PCM is really better
At present comes where I need assistance, so the hw-f550 is very loud, set the volume to thirteen and no college, gone upwardly to xx and its extremely loud and not appropriate every bit I live in a flat. Had this soundbar for over 5yrs and its never failed me.
So decided to upgrade the soundbar as my 4k TV is less than a Yr old and thought its time for an upgrade for sound, then bought the samsung q60t soundbar, arrived and setup it all up past just plugging it in, TV recognised it directly away.
And then no settings changed either on the Goggle box or soundbar, went onto YouTube to play so.e music to test the new soundbar and at volume lvl 13 y'all can't hear anything, accept to plow the volume upwardly to xx for whatever decent aural sound, spent hours trying to figure out how to get the aforementioned volume output every bit my previous 5yr old soundbar and nothing, samsung tech support went through loads of things and nothing till eventually I disconnected the hdmi cable from the soundbar and connected my galaxy s10 to the soundvar via Bluetooth and the soundbar actually gave me the aforementioned book output as my former soundbar, plugged hdmi back in and back to the terrible sound output.
Am I doing something wrong or could this but exist a dud unit, are y'all supposed to use/set under Telly options for the sound to PCM and apply this all the time? If then how exercise you lot force it to instead of it automatically irresolute depending on the program/app the Tv is running?
- #24
No, PCM is no better than streaming the bodily format the audio was originally encoded every bit. In some case the original format will be uncompressed PCM, but this doesn't mean that such audio is or will be supperior to audio that has been formatted and packaged differently.
If accessing sound via YouTube so you'd not get anything just ii aqueduct PCM regardless of whether you lot are bitstreaming it or allowing the source device to decode it. The YouTube service only provodes access to sound encoded as 2 aqueduct PCM.
If decoding (inpackaging) the sound prior to the device really processing the sound and or amplifying it and then the but difference will be the device decoding the audio. You lot cannot derive better PCM from what is basically the aforementioned formatted audio. What is being decoded to requite you the PCM signal is the aforementioned audio data then why would you get better quality PCM data if streaming information technology from a source every bit unpackaged PCM information?
If using accented volume so this isn't standardised and will not result in the aforementioned book at the same setting on different devices. If you need the volume to exist greater or louder then turn the book up on the device amplifying the audio.
Audio levels are not bossted or diminished relative to whether the audio is decoded or not prior to output. The headroom associated with a PCM indicate will be the excat same headroom associated with the formatted and packaged audio data information technology was derrived from. The PCM fata can merely ever mirror what was packaged if the source derrives its PCM data from the packaged, formatted source.
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Pcm 2.0 Vs Dolby Digital 5.1,
Source: https://www.avforums.com/threads/is-pcm-better-or-worse-than-dolby-digital.2281174/
Posted by: teerfaloseention.blogspot.com
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