AVNovice Posted April 9, 2023 Posted April 9, 2023 I have a yamaha RX-S600 (2014 slim 5.1-channel) - Use for TV / Netflix / Bluray 4k Player / XBOX / (not for Audio) I watch a lot of news, documentaries, sport, netflix and HBO and Xbox. The sound setting I use is "Standard" and "Pro logic", I can't tell the difference… Is there an industry name for the sound setting that comes with the device but not dolby, dtx... My Yamaha calls it a "program" It is probable that "Standard" chooses the best sound automatically, which may be Dolby Pro Logic? Newer devices have newer decoding like Dolby Atmos and DTS:X, Is everyone switching between these all the time? How do you know what movie, tv show is configured to each?
Guest Posted April 9, 2023 Posted April 9, 2023 You are currently using the optical audio output from TV which limits the formats and has poorer audio. As mentioned in your other thread, you should be using the TV's eARC HDMI output to feed your ARC HDMI input of your AVR. That way, you will get to enjoy Dolby Digital + audio from Netflix/HBO which I assume you access from your TV. The AVR automatically selects the correct audio format from TV/Netflix (and Blu Ray player connected directly via HDMI with even better audio).
cwt Posted April 9, 2023 Posted April 9, 2023 4 hours ago, AVNovice said: The sound setting I use is "Standard" and "Pro logic", I can't tell the difference… Is there an industry name for the sound setting that comes with the device but not dolby, dtx... My Yamaha calls it a "program" It is probable that "Standard" chooses the best sound automatically, which may be Dolby Pro Logic? Newer devices have newer decoding like Dolby Atmos and DTS:X, Is everyone switching between these all the time? How do you know what movie, tv show is configured to each? Speaking specifically about yamahas use off the word '"program" this means a dsp addition to the standard pcm received from the source [or a modification with yamahas proprietary algorithms of the original decoded codec..] they use this term because of the plethora of sound modes available -they are known for this.. You will find that "dolby pro logic " is an old dsp to be applied to a dsp encoded stream which will expand that 2ch stream to 5.1 channel surround sound . Now if you hit that encoded 2ch stream with PL2X [PRO LOGIC 2X] that will expand the original 2 channels to 7.1 using back surrounds as well if you get some.. This too was developed ages ago but is newer and a better algorithm than DPL.. Both these algorithms are just expansions via dsp ; what is much better is true discrete codecs like dolby digital plus and dts . At the top of the heap are lossless codecs like dolby truehd and dts hdma which are the basis for dolby atmos and dts-x object codecs we have today . As snoopy says you need to use e-arc to get the best discrete sound and avoid any legacy dsp modes unless its a basic 2ch lpcm stream from your tv [hd channels can send 5.1 lossy discrete] but sd channels can only manage 2ch sound .. Try and set your avr to auto and when it receives a discrete 5.1 signal your osd will read the codec its decoding for you ie will say dolby not just pl2 ..
SGS Posted April 10, 2023 Posted April 10, 2023 Pro logic is quite old and if memory serves me well it's derived from a 2 channel signal, so not very good. As Snoopy said, your better of using eARC as this will support more channels, but does your avr have HDMI inputs. I've found before that some TV's when playing from an external source will only pass through a 2 channel audio stream even with optical and when playing from internal sources like DTV it will pass 5.1. So again, best to use HDMI.
Guest georgeDV Posted June 20, 2023 Posted June 20, 2023 Hello. I saw the information of the Yamaha RX-S600, your device includes a version of Dolby: DOLBY True HD and DTS HD. They most work in automatic detection if the source is 2.1, 3.X, 5.1 but: it is limited because you have just L + R Stereo 2 Channels. I connect my Codec TV Provider with Optical -Optical input and my Sony displays in Auto Mode the kind of sound received. My old Onkyo has Optical Audio Input, and it mutes (no sound) with some TV channels with an unknown audio format. If your TV does not have Audio Return Channel (ARC) wou will suffer the same: the TV won't know how to deal with the audio. In my Sony, AUTO, Dolby I, Dolby II, Cinema A, Cinema B, are modes of sound with "emphasis" in Action movies, Music, Romance movies and so, a kind of "scenarios". Dolby I or II or Prologic force in some way the signal received to offer different sound spectrum, I talk based in my Sony receiver, for sure you should notice some difference in your Yamaha but nothing so special because you have a 2 channel device, not a Multi Channel that takes advantage of 3.X, 5.1.
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