Talk:CD player

References?

I'm having problems refering to the proper sources of the data. I'm basing this article in the redbook standard and a few service manuals of CD players. The standard is not freely available and I think the manuals are copyrighted so I should add them anyways?

Also, part of this has a different language publication as a source, I don't know if that is going to represent a problem.

Zim 256 (talk) 16:01, 31 January 2014 (UTC)

Citing copyrighted material is not a problem if you aren't linking to the content. Linking to copyrighted content is a gray area, compare Talk:Conventional_PCI#OFFICE_action_2 and Wikipedia:Citing_sources#Convenience_links_2. Languages other than English are alright, see WP:NONENG and WP:NONENGEL. You can indicate the source language using the language parameter of the various citation templates ({{cite web}}, etc) or by using Template:Link language. Conquerist (talk) 00:03, 1 February 2014 (UTC)

Added (adding actually) How it works

This has a "work in progress" status. I will keep updating and adding as I get the time.

Zim 256 (talk) 14:02, 28 January 2014 (UTC)

Pickup mechanisms, features, pictures

This part needs clarification, citation or discussion "The radial mechanism works best for CD-ROMs, though, as the speed of the disc increases". I think that's false, the swing arm mechanism provides higher seek speed than a linear movement based on the rotation of a motor.

The problem isn't seek speed - it's that a swing-arm mech conventionally only has a single actuator for both seek and tracking, and it's carrying the substantial moving mass of the whole optical pickup assembly. As the disc speed increases, the required bandwidth of the tracking error signal also increases, and moving the whole pickup at those frequencies would require excessive power. The linear mechs have this feedback split into low frequency (sled) and high frequency (lens positioner) components anyway, so it's a lot more tractable.

Another consideration (although less important) is that single beam pickups have a wider capture range for both focus and tracking and produce a correspondingly smaller error signal - this can obviously be addressed by using more servo gain, but servos with high gain and wide bandwidth (needed because of the higher disc speed) tend to be more difficult to stabilize. 116.76.111.53 (talk) 03:36, 4 April 2014 (UTC)

The article needs a picture of the swing arm mechanism to illustrate. The 3-beam tracking mechanism is introduced but no mention of the single beam is made, also no description about how any one works. "Interpolation, while not usually advertised, is present in most recent CD players. Interpolation is a way to correct errors that may be present on a compact disc, perhaps due to dust, scratches or dirt." Interpolation is a part of the Compact disc standard and thus, present on all CD players to date, since the CD101 or CD100 to the latest in production. Zim 256 (talk) 00:04, 20 January 2014 (UTC)

I did a couple of edits on the article and added some info and pictures. Replaced the picture showing just a player lens with one that I think is more complete showing the underlining workings. Fixed all the issues I presented in the previous message. I know this shouldn't be on the talk page but bear with me, I'm new on this and forgot to add my reasons after each edit. Zim 256 (talk) 04:15, 20 January 2014 (UTC)

Redirect?

True or false: this article can re-direct to Comact disc. 66.32.132.150 00:30, 15 May 2004 (UTC)

• It can, but lets just keep this as per the mentioned criticism about the CD players. (unsigned comment from anon)

To Comact disc?! Is this a joke? Or are there countries which have technology of this name? Rintrah 14:15, 20 October 2006 (UTC)

This is not

This article is a STUB???

The Fox Man of Fire 16:54, 14 March 2006 (UTC)

Removed stub --Lenilucho 18:39, 19 June 2006 (UTC)

---

Why is there no history of the CD Player? Who invented it? When? First commercial model...etc

The history is on the Compact Disc article.--Lenilucho 18:38, 19 June 2006 (UTC)

CD Life span

"If proper care is taken, a CD can be played indefinitely without any loss in audio quality." Aside from the lack of citation (as far as I can tell), I once heard that CDs have a shelf life of around 50 years... might be worth investigating

In fact, this entire page seems to be lacking citations Hydroksyde 23:41, 21 June 2006 (UTC)

This is true (not necesarily 50 years, the time depends on the brand of the media). But the article refers to the fact that a CD does not worn like an LP or a cassette, because of the lack of friction of the system itself.--Lenilucho 01:19, 22 June 2006 (UTC)

Perhaps, but that revert was unnecessary, as I didn't change any information, just added the citation/unreferenced templates. Just even if something is true, it *still* needs references, see Wikipedia:Verifiability. Hydroksyde 06:39, 22 June 2006 (UTC)

Ok, I added information. Do you think the "citation needed" is still necesary?--Lenilucho 03:09, 23 June 2006 (UTC)

You've missed my point entirely. You can't just write things down off the top of your head. You need to find any information you add in a reputable publication (eg a book, or a reputable newspaper), that can be verified, and reference this information appropriately. Hydroksyde 05:46, 25 June 2006 (UTC)

Ok, I get it. I have no idea where to find such information. May be on Sony/Philips/TDK or similar websites? --Lenilucho 06:25, 25 June 2006 (UTC)

Only Critisms?

CDs aren't all bad, otherwise they would have been phased away a long time ago. This article only discusses the critisms of the CD and CD players. Today, there are more modern players/burners which are now more capable and less cubersome in the past. This article resembles more like a stub than an article. This article should have some advantages included. This article should also have a complete explanation of how it works and how it reads CDs.

Copyedits and article tone

I have made several copyedits, which hopefully make the article more readable. I removed much of language of the kind (exaggerated here for effect): CD players are cool, but they, like, suck compared to other technologies, like DVDs which have scrolling interface user-friendly text.

In future, please restrict the content to objective descriptions, and refrain from reviewing the technology.

If the copy-edit tag remains, I might return later to tamper with the rest of the article. Rintrah 12:50, 20 October 2006 (UTC)

I've gone over and done the copyediting I can do, but the interface section still needs work. It doesn't actually describe the interface of a CD player, but rather compares it to the interface of an MP3 player. I also removed the following:

"For the home consumer, some options exist: Sony XL1 (or XL1B2) - a Windows Media Center based disc changer, for local (MCE) use only PowerFile For larger enterprise solutions, the following are available: PowerFile (A3 and PSA models) JVC Pionneer (DRM series) PoINT Software (www.pointsoft.de) - develops software to manage CD/DVD changers in corporate environments (supplements enterprise features)" Wikipedia is not a product quide.

I will remove the copyedit tags and add a expand tag to the interface section if I can't find any info to add to it. Natalie 17:57, 22 November 2006 (UTC)

user interface

Removed the following from "User Interface": "Compared to digital audio players, which have screens, CD players are most often less user-friendly, because tracks are numbered rather than displayed with text. However, CD-Text has overcome these aforementioned limitations; so text is displayed with the CD player software available on computers and modern CD players. Tray numbers on CD changers are often confusing for those who want to select individual tracks. MP3 players, which list tracks in alphabetical order, however, are easier to use."

Uncited POV. If readding, please provide citations. Natalie 19:15, 22 November 2006 (UTC)

iPod

Article says "the first generation iPod can hold an equivalent of 5 discs with a 128k sample rate for each song". But the first generation iPods are 5GB, which is more than 5 CDs or 5*700MB=3500MB, and that's lossless, not 128kbps. At 128kbps it should store >60 CDs. Shawnc 04:20, 9 December 2006 (UTC)

Mega-disc CD players

I've added some info on the mega-disc type of CD changers. Some info on impact of Hard disk based MP3 player on the mega-disc changer market would be useful. Do they still make this type of changer? Also their have been some combo CD players/HD-based mp3 player systems on the market at various times that allowed CD's inserted into them to be ripped to an internal HD drive on the unit. They where offered as a alternative to using a computer for this task. These units where designed exclusively for playing digital music through one's stereo system and where not very portable. If anyone has any info on this type of CD/MP3 combo player then please add it. --Cab88 08:27, 5 February 2007 (UTC)

Slot-loading interface?

I can't seem to find any information on the slot loading interface common with laptop computers and many car stereos. Should a section be added about this format? ···日本穣^{? · Talk to Nihonjoe} 18:54, 18 June 2007 (UTC)

Portable CD Player merge

I am suggesting that Portable CD Player be merged into this article. There is no reason to have a separate article on it, especially when it can fit neatly into this article. Anakinjmt 21:24, 13 November 2007 (UTC)

• Oppose The article has a good amount of information and deserves to have its own article. Limetolime (talk) 16:46, 8 December 2007 (UTC)

• Support I don't think there is that much information on Portable CD Player. It could be incorporated into one or two paragraphs here. Some of it can be removed... listing the Stop and Play buttons etc. is kind of silly. Fritter (talk) 15:38, 15 March 2008 (UTC)

• Conditional support: the Portable CD Player article is lacking authorative resources, whereas Compact Disc player has some references that are properly cited referenced and work to its advantage. Hence, I believe Portable CD Player should have some better references which are equal in quality or better then Compact Disc Player. This being said, I believe this can be fixed by a merger and sharing the same references. For example, the references at Compact Disc Player (here)can most likely be of used to describe Portable CD player. Furthermore "CD" is also an acronym for for Compact Disc, this could be elaborated within the first few sentences.
  I believe we have an unintentional content fork per WP:CFORK and I recommend that Wikipedia's policy at CFORK be closely observed for this case. Here is where my conditional support enters into the equation: If, for some reason Portable CD Player, within the next 7 days can have some authorative references then I believe this merger should be re-evaluated and that the articles should remain seperate, per the status quo; That's until everyone has the time to re-evaluate the changes. (I no way does this mean that I support seperate articles. Even if Portable CD Player is magically improved to a featured article status I still believe it would need to be re-evaluated. What I mean by this, is exactly what I said, if the article Portable CD Player is improved it should be re-evaluated, otherwise I believe the two articles should be merged one into the other. Finally, I believe this merger idea is supported by wikipedia's policy WP:CFORK. --CyclePat (talk) 15:03, 17 April 2008 (UTC)

• Support and Oppose Portable CD Player doesn't have much information, so I guess it should merge. But, I also think that when it merges (if it merges of course.. no reason for assuming) that we should be able to easily find information for the Portable CD Player instead of.. for example, having to look through the "History" section of the article to find the History of the Portable CD Player. That's one of the reasons I may oppose this. I oppose more than I support.--Xxhopingtearsxx (talk) 23:30, 20 May 2008 (UTC)

• Oppose The subject Portable Cd Players needs its own article due to the huge number of people who are searching this phrase. According to search statistics data from KeywordDiscovery.com, there are as many people as a third of the number of people who search for Cd Players, who search for Portable Cd Players. Therefore, the subject needs its own article that may as good as possible provide the searcher with as correlating information as possible. Analogically, there are many types of cars. Sports cars, vintage cars, race cars etc etc. These have their own articles in wikipedia. When people search these things, a wikipedia article for each comes up. There may be some brief comments in the Cd Player article about Portable Cd Players that links there.

• Oppose Portable Cd players were one of the most popular portable audio player in early 2000. Despite the lack of information in the article, the subject is important enough to have it's own article. C'mon, merging this is like saying that in 5 years from now mp3 player wouldn't need a separate article. talking Cherry 23:56, 23 July 2008 (UTC)

Anything about MP3 CD players?

Is there anything in this article about CD players that can play discs contating MP3 files (not analog audio, but digital files)? I want to add a little something to digital audio player, as it is sorely lacking of it, except the Phillips MP3 CD player pic. Thanks! --Jw21/PenaltyKillah ^{VANucks|12-9-2} 07:31, 6 December 2007 (UTC)

Proposed move

The following discussion is an archived discussion of a requested move. Please do not modify it. Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a move review. No further edits should be made to this section.

The result of the move request was: page moved to CD player. Arbitrarily0 ^(talk) 00:48, 29 March 2013 (UTC)

---

Compact Disc player → Compact disc player – Compact Disc was recently moved to Compact disc This article should use lowercase "d" for to be consistent. Voortle (talk) 12:24, 21 March 2013 (UTC)

• Support as uncontroversial/technical move. --BDD (talk) 20:12, 21 March 2013 (UTC)
• Oppose I'd think CD player would be simple enough - see CD single. Unreal7 (talk) 22:58, 23 March 2013 (UTC)
• Oppose, in favor of a move to CD player. Similar to that of this discussion back in June.  — Statυs (talk, contribs) 23:02, 23 March 2013 (UTC)
• Yes, that's probably even better. --BDD (talk) 04:22, 24 March 2013 (UTC)
• Oppose - I oppose the change but support the change to "CD player". Who actually says "compact disc player"? AnimatedZebra (talk) 14:04, 26 March 2013 (UTC)
• Oppose. Commonly used term is CD player. Binksternet (talk) 15:23, 26 March 2013 (UTC)
• Support move to CD player. Portable CD player already uses it. RightGot (talk) 21:16, 27 March 2013 (UTC)
• Oppose. Should be at CD player. Note that while portable CD player exists, portable compact disc player and portable Compact Disc player don't, which just shows that "compact disc player" is a rare term. 4.238.1.197 (talk) 01:48, 28 March 2013 (UTC)

The above discussion is preserved as an archive of a requested move. Please do not modify it. Subsequent comments should be made in a new section on this talk page or in a move review. No further edits should be made to this section.

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A Commons file used on this page has been nominated for deletion

The following Wikimedia Commons file used on this page has been nominated for deletion:

• Cd changer carousel.jpg

Participate in the deletion discussion at the nomination page. Community Tech bot (talk) 00:06, 15 July 2018 (UTC)

Not making sense:

The last part about computer-based CD changers compares them with hard drives. Yet at that time when they existed (stated to be circa 1990), no CDs were Read-Write like a hard drive — CD's were read only. The R/W technology for CD's didn’t exist yet.

1) So what was the purpose of the changers, since it clearly wasn’t to replace hard drive capacity? Like a huge ROM? This is not clear at all.

2) Perhaps there shouldn’t be any comparison with hard drives.

3) The purpose of the changers should be given in the article. JWmpls (talk) 01:46, 31 October 2018 (UTC)

Someone just made up this whole section. I have removed it. Kendall-K1 (talk) 04:03, 31 October 2018 (UTC)

CD Changers were popular with BBS operators. It provided a way to make several GBs of files available for a fraction of the cost of storing those files on hard drives. However, they did not work well for a BBS with multiple users online simultaneously if users wanted to download files from different discs due to disc swapping. CorriganJohn (talk) 01:27, 9 December 2023 (UTC)

CD player

External links Mahita Masud (talk) 19:08, 3 February 2020 (UTC)

Digital outputs?

The article covers data conversion through the player's DAC into analogue outputs, but appears to be missing what happens when the CD player is equipped with digital outputs: coaxial and optical (TOSLINK). 182.239.149.95 (talk) 05:53, 20 July 2022 (UTC)

Duplicate History sections

Compact Disc Digital Audio § History is substantially the same as the history section in this article. The scope of the content of both sections is beyond CD players so I propose to remove the duplicated content here and replace it with a link or reference to Compact Disc Digital Audio § History. ~Kvng (talk) 22:58, 9 August 2023 (UTC)