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ldfan
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Post subject: Re: What is CX? Posted: 03 Nov 2022, 17:50 |
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Joined: 28 Jun 2014, 05:59 Posts: 1454 Location: San Francisco, CA USA Has thanked: 422 times Been thanked: 533 times
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CX was also added for this reason per its Wikipedia page..... While CX greatly improved the audio quality of LaserDisc's FM audio tracks, its primary reason for adoption was to decrease the amount of interference between the right channel's FM audio carrier and the video carrier's first chroma sideband. Without CX, strict filtering during mastering and playback as well as keeping color saturation below 75% on the master were required to keep any interference below −35 dB, which ensured that no beats or other artifacts were visible in the demodulated image.You can read the entire entry here.... https://en.wikipedia.org/wiki/CX_(noise_reduction)
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noogie-man
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Post subject: Re: What is CX? Posted: 03 Nov 2022, 18:29 |
Serious fan |
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Joined: 03 Jul 2018, 20:50 Posts: 145 Location: Sweden Has thanked: 27 times Been thanked: 15 times
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ldfan wrote: CX was also added for this reason per its Wikipedia page..... While CX greatly improved the audio quality of LaserDisc's FM audio tracks, its primary reason for adoption was to decrease the amount of interference between the right channel's FM audio carrier and the video carrier's first chroma sideband. Without CX, strict filtering during mastering and playback as well as keeping color saturation below 75% on the master were required to keep any interference below −35 dB, which ensured that no beats or other artifacts were visible in the demodulated image.You can read the entire entry here.... https://en.wikipedia.org/wiki/CX_(noise_reduction) Great info, thanks buddy When I play discs which can shift between CX settings I should always keep it in CX-STEREO mode for best audio quality?
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ldfan
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Post subject: Re: What is CX? Posted: 03 Nov 2022, 19:40 |
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Joined: 28 Jun 2014, 05:59 Posts: 1454 Location: San Francisco, CA USA Has thanked: 422 times Been thanked: 533 times
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noogie-man wrote: Great info, thanks buddy When I play discs which can shift between CX settings I should always keep it in CX-STEREO mode for best audio quality? In most cases, you don't have to do anything. CX in a high percentage of discs already have a flag in place to turn it on and prevent the user from overriding it (as crashoveride already stated). Thus, you simply let the player do its thing. On Digital Sound discs, it doesn't even matter at all since the digital tracks do not utilize CX so it's irrelevant. On the rare analog audio only audio discs where there is no flag and thus you can choose to keep CX on or off, you should probably look to the jacket or the disc itself for the CX mark as that would mean the disc is encoded but you have to manually turn it on. If there is no CX logo anywhere, best to keep it off. Also, as signofzeta mentioned, don't get hung up on this "CX-Stereo" indicator. They are two separate things. The reason you see it is because you must have one of the newer players where Pioneer combined all the Digital, Analog, and CX functions into one button on the remote (e.g.: "D/A CX"). On older players, we have two buttons labeled something like "Auto Digital Analog" and "CX".
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noogie-man
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Post subject: Re: What is CX? Posted: 04 Nov 2022, 14:35 |
Serious fan |
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Joined: 03 Jul 2018, 20:50 Posts: 145 Location: Sweden Has thanked: 27 times Been thanked: 15 times
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ldfan wrote: noogie-man wrote: Great info, thanks buddy When I play discs which can shift between CX settings I should always keep it in CX-STEREO mode for best audio quality? In most cases, you don't have to do anything. CX in a high percentage of discs already have a flag in place to turn it on and prevent the user from overriding it (as crashoveride already stated). Thus, you simply let the player do its thing. On Digital Sound discs, it doesn't even matter at all since the digital tracks do not utilize CX so it's irrelevant. On the rare analog audio only audio discs where there is no flag and thus you can choose to keep CX on or off, you should probably look to the jacket or the disc itself for the CX mark as that would mean the disc is encoded but you have to manually turn it on. If there is no CX logo anywhere, best to keep it off. Also, as signofzeta mentioned, don't get hung up on this "CX-Stereo" indicator. They are two separate things. The reason you see it is because you must have one of the newer players where Pioneer combined all the Digital, Analog, and CX functions into one button on the remote (e.g.: "D/A CX"). On older players, we have two buttons labeled something like "Auto Digital Analog" and "CX". That's correct my remote has the Audio D/A button. This feature is for the newer players? Mine's a Pioneer CLD-R7G. When playing discs I always press the button switching to analog sound as I prefer this over digital sound.
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crashoveride
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Post subject: Re: What is CX? Posted: 04 Nov 2022, 19:12 |
Honest fan |
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Joined: 01 May 2022, 00:30 Posts: 66 Location: United States Has thanked: 34 times Been thanked: 12 times
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The only reason I'd use the analog tracks is if the digital track was mastered incorrectly (quite a few Toei anime releases, namely the DBZ movies, suffer from this!) or there's bonus features on the analog tracks
I also have a R7G, but I don't recall "CX-Stereo" being the text displayed. When cycling Audio D/A, it would not let me turn off CX at all, and would just go through Digital stereo, analog stereo, digital left and right, and analog left and right
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jd213
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Post subject: Re: What is CX? Posted: 05 Nov 2022, 17:17 |
Serious fan |
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Joined: 13 Jul 2012, 10:29 Posts: 162 Location: Japan Has thanked: 28 times Been thanked: 35 times
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Other than a severely rotted Discovision disc, I think the only analog-only LD without CX I have is https://www.lddb.com/laserdisc/11199/98 ... ey-of-Wind . I did some capture tests on it a while back, and you could hear things like the disc spinning up in the audio signal. Assuming proper mastering, an analog track with CX should be excellent quality though. IIRC Hi-Fi VHS has a slightly better SN ratio, but I doubt it would be noticeable.
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rein-o
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Post subject: Re: What is CX? Posted: 05 Nov 2022, 17:35 |
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Joined: 03 May 2004, 19:05 Posts: 8104 Location: Dullaware Has thanked: 1219 times Been thanked: 843 times
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jd213 wrote: . I did some capture tests on it a while back, and you could hear things like the disc spinning up in the audio signal.
Assuming proper mastering, an analog track with CX should be excellent quality though. IIRC Hi-Fi VHS has a slightly better SN ratio, but I doubt it would be noticeable. WOW I wonder what the deal is with your setup, I've only ever heard issues when its an older disc and poorly mastered, not from spinning like a turntable ever. Lots of older anime and Japanese discs have no CX if I remember correctly, don't know why they didn't adopt the CX as much but I think I remember reading from disclord once something else came out they didn't need to push the CX stuff, or maybe it was blam1 who said it?? Or someone else I can't remember right now. But its CX people, who cares, its on the disc and only some older players can shut it off and from what I remember as a kid I couldn't tell any difference with it on or off and I grew up with a nice sound system, not amazing but nice.
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noogie-man
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Post subject: Re: What is CX? Posted: 05 Nov 2022, 19:07 |
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Joined: 03 Jul 2018, 20:50 Posts: 145 Location: Sweden Has thanked: 27 times Been thanked: 15 times
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laserfanhld-gb wrote: You prefer LD analog audio over PCM digital, seriously? i only have a two channel stereo without a AC-3 demodulator can i use PCM Digital on this setup? The analog audio is so much more alive like listening to a vinyl record When I watch Cobra I always turn the analog audio on even if it's louder on digital.
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jd213
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Post subject: Re: What is CX? Posted: 05 Nov 2022, 19:19 |
Serious fan |
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Joined: 13 Jul 2012, 10:29 Posts: 162 Location: Japan Has thanked: 28 times Been thanked: 35 times
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rein-o wrote: jd213 wrote: . I did some capture tests on it a while back, and you could hear things like the disc spinning up in the audio signal.
WOW I wonder what the deal is with your setup, I've only ever heard issues when its an older disc and poorly mastered, not from spinning like a turntable ever. The same issue occurred both with a DVL-919 and an HLD-X9 directly into an ESI U86XT, so pretty sure it wasn't the setup. I'll see if I can dig up the captures again if you're interested.
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jakeheke
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Post subject: Re: What is CX? Posted: 06 Nov 2022, 03:47 |
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Joined: 26 Jun 2019, 06:17 Posts: 577 Location: New Zealand Has thanked: 139 times Been thanked: 180 times
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noogie-man wrote: laserfanhld-gb wrote: You prefer LD analog audio over PCM digital, seriously? The analog audio is so much more alive like listening to a vinyl record Just for people reading this in the future this statement is not true. Analog sound from LaserDisc is similar to a FM radio station. Digital is far more cleaner and is basically full CD quality
_________________ CLD-R7G CLD-D590 VSA-E07 AC3RF+DTS iScan DUO Processor Check out my small but loved collection here..
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laserfanhld-gb
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Post subject: Re: What is CX? Posted: 06 Nov 2022, 10:07 |
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Joined: 28 Jun 2019, 18:26 Posts: 569 Location: UK Has thanked: 257 times Been thanked: 236 times
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jakeheke wrote: noogie-man wrote: laserfanhld-gb wrote: You prefer LD analog audio over PCM digital, seriously? The analog audio is so much more alive like listening to a vinyl record Just for people reading this in the future this statement is not true. Analog sound from LaserDisc is similar to a FM radio station. Digital is far more cleaner and is basically full CD quality Pretty much agree with this, if I’m honest I’ve heard some rather decent hi-fi stereo tracks on VHS/SVHS tapes but none of the analog audio tracks that I’ve yet experienced on LD in the last 30 years of living with the format struck me as anything special tbh and certainly nothing like vinyl LP, serviceable at best maybe. The PCM digital audio on LD especially so when fed to a high quality off board dac sounds simply amazing.
_________________ Pioneer HLD-X9/CLD-925/CLD-2950 OPPO BDP-105D EU ARCAM AVR-600 JVC DLA-X7000BE Lumagen Radiance 2144
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