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Post subject: Soundtracks on Laserdisc Help Section (draft) Posted: 31 Oct 2019, 13:34 |
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Joined: 07 Aug 2002, 23:37 Posts: 4569 Location: Tokyo Has thanked: 299 times Been thanked: 1166 times
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Hello everyone! Since the different flavors of soundtracks on DiscoVision/LaserVision/LaserDisc seems to be a somewhat complicated topic for new collectors or people trying to jump from/to PAL and NTSC or confused about the different soundtracks of MUSE/Hi-Vision discs, I started a draft help section here: https://www.lddb.com/help_sound.phpFor each example, I'm trying to give the earliest commercial release as possible (first stereo, first CX, first Digital, etc.). I still have a big section on AC3 and DTS to draft, and then move to Hi-Vision (A-mode, B-mode, EFM, etc.). Could you take a look at the draft and make some comments if I made mistakes or over-simplified things? Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: Soundtracks on Laserdisc Help Section (draft) Posted: 01 Nov 2019, 05:39 |
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Joined: 07 Aug 2002, 23:37 Posts: 4569 Location: Tokyo Has thanked: 299 times Been thanked: 1166 times
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allenwrench wrote: Seems a lot of early titles do not indicate any surround information on the jackets though it was present in the soundtrack, how should this type be classified? Same for CED announced as "Stereo" but actually carrying over the surround information from the original masters. Best way would be to ... just play the disc and turn on Prologic/Surround decoding to for sound the center/rear channels? Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: Soundtracks on Laserdisc Help Section (draft) Posted: 01 Nov 2019, 10:37 |
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Joined: 07 Aug 2002, 23:37 Posts: 4569 Location: Tokyo Has thanked: 299 times Been thanked: 1166 times
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blam1 wrote: The section on RSS is incorrect. The digital tracks on the disc contain the program code so the only listenable audio is on the analog tracks. I'm basing this on the single LDRom title I have, but I can't imagine any of the others would be different. Would you have some more data in it? Realizing it's not "surround" but stereo spatialisation actually. https://segaretro.org/Roland_Sound_Spaceblam1 wrote: The very early Digital Sound players could not select Digital 1/L and 2/R independently. You won't have "4 separate audio" programs until much later. I think Criterion were the only ones to actually do this in supplemental sections. We'll have it as an additional feature when I can find time (and internet at home, now looking at Nov 15th!) to code further the Hardware section. Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: Soundtracks on Laserdisc Help Section (draft) Posted: 03 Nov 2019, 11:31 |
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Joined: 07 Aug 2002, 23:37 Posts: 4569 Location: Tokyo Has thanked: 299 times Been thanked: 1166 times
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admin wrote: I still have a big section on AC3 and DTS to draft, and then move to Hi-Vision (A-mode, B-mode, EFM, etc.). AC3 and DTS added! Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: Soundtracks on Laserdisc Help Section (draft) Posted: 03 Nov 2019, 17:58 |
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Joined: 07 Aug 2002, 23:37 Posts: 4569 Location: Tokyo Has thanked: 299 times Been thanked: 1166 times
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ryosaeba84 wrote: And a question about DTS, you say that closed caption can't be contained on a disc, but why is my street fighter copy (only dts disc I have) saying that it has closed captions ? was it a lie ? (can't verify it) Ahhh might have been my mistake. CC is in the video signal... LD-G is in the audio signal. Correct? Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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admin
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Post subject: Re: Soundtracks on Laserdisc Help Section (draft) Posted: 06 Nov 2019, 14:41 |
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Joined: 07 Aug 2002, 23:37 Posts: 4569 Location: Tokyo Has thanked: 299 times Been thanked: 1166 times
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The draft made it to "public release". I let the HELP -> SOUNDTRACKS become a public link. Hope it will be helpful! Julien
_________________ HARDWARE DATABASE HLD-X0/9 LD-S9 OPPO 105/205 SL-1200G LDD-1 MSC-4000 R2144 PONTUS II C45 MC257
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atsampson
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Post subject: Re: Soundtracks on Laserdisc Help Section (draft) Posted: 06 Nov 2019, 20:28 |
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Joined: 08 Feb 2007, 17:24 Posts: 35 Location: Scotland Has thanked: 8 times Been thanked: 5 times
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Quote: CC is in the video signal... LD-G is in the audio signal. Correct? Yep. CC uses two lines of the video signal (the second includes the first active half-line of the picture, so you can often see it twittering away right at the top of the display). LD+G uses the R to W subchannels of the CD-style soundtrack, like CD+G does. Quote: MONO soundtrack can also be CX-encoded but this brings little difference to the final result. CX is designed to work on STEREO materials. The opposite is also true, if you do not have a STEREO or MONO sountrack but have different soundtracks on Left and Right stracks (for example a bilingual release), then CX encoding cannot be used. The first bit there doesn't sound quite right. CX should work fine on mono soundtracks (i.e. where both channels are the same) or on stereo soundtracks. It won't sound very good when the two channels carry different material because the same gain adjustment is applied to both channels in the CX scheme - so volume variation on one channel would cause the background noise level on the other channel to vary.
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blam1
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Post subject: Re: Soundtracks on Laserdisc Help Section (draft) Posted: 06 Nov 2019, 23:03 |
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Joined: 21 Dec 2002, 18:44 Posts: 961 Has thanked: 0 time Been thanked: 122 times
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admin wrote: blam1 wrote: The section on RSS is incorrect. The digital tracks on the disc contain the program code so the only listenable audio is on the analog tracks. I'm basing this on the single LDRom title I have, but I can't imagine any of the others would be different. Would you have some more data in it? Julien Best as I can determine, the MegaLD and LD-Rom2 formats were laid out on the disc in exactly the same way. Analog audio playback, PCM tracks for game data. The difference was which game pack was required. MegaLD required the Sega pac. and LD-Rom2 required the NEC pac.
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