cd

Compact disc (CD) is a digital optical disc data storage format, co-developed by Philips and Sony. The format was originally developed to store and play only sound recordings but was later adapted for storage of data (CD-ROM). Several other formats were further derived from these, including write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Disc (VCD), Super Video Compact Disc (SVCD), Photo CD, PictureCD, CD-i, and Enhanced Music CD. Audio CD players have been commercially available since October 1982, when the first commercially available CD player was released in Japan.
Standard CDs have a diameter of 120 millimetres (4.7 in) and can hold up to about 80 minutes of uncompressed audio or about 700 MiB of data. The Mini CD has various diameters ranging from 60 to 80 millimetres (2.4 to 3.1 in); they are sometimes used for CD singles, storing up to 24 minutes of audio, or delivering device drivers.
At the time of the technology's introduction in 1982, a CD could store much more data than a personal computer hard drive, which would typically hold 10 MB. By 2010, hard drives commonly offered as much storage space as a thousand CDs, while their prices had plummeted to commodity level.
In 2004, worldwide sales of audio CDs, CD-ROMs and CD-Rs reached about 30 billion discs. By 2007, 200 billion CDs had been sold worldwide. CDs are increasingly being replaced by other forms of digital storage and distribution, with the result that audio CD sales rates in the U.S. have dropped about 50% from their peak; however, they remain one of the primary distribution methods for the music industry. In 2014, revenues from digital music services matched those from physical format sales for the first time.

View More On Wikipedia.org
  1. M

    Question CD transport to DAC which is the master clock

    Hi Interested to know if when connected via coax the cd transport clocks control the data or the receiving DAC. My transport is a tag mclaren dvd32r the dac is currently being built using iancanada parts and will have the high end q7 reclocker.
  2. G

    Can I mix and match speakers on a Sony 6 CD unit in a mondeo mk3 =2007

    2 speakers in my mondeo ghia have packed in and was wondering can I improve sound by adding better speakers to the front and keep 2 old in the rear. Output on speakers says 20 watt but alpine/pioneer say 200watt? I can get 2 ford speakers secondhand but just curious.
  3. Westovski

    Question Standalone CD Player & Speakers

    Hi all, Can anyone recommend a reasonable CD player for and speakers that doesn't required external amp etc. I'd prefer something relatively small, but of reasonable quality. I'm not a massive audiophile (wrong forum, I know! :)) so don't have an external amp anymore etc. I may well invest in...
  4. amberlamps

    For Sale Ruark R3 all in one Dab+ CD BT internet radio optical line in Spotify Connect etc..

    Boxed and in absolutely superb hardly used condition, purchased for the bedroom and used very little. Audio Frequency response 40Hz – 20kHz Drivers 2 x 75mm Ruark NS+ Amplifier 30W Analogue class AB Enhancements Bass, treble, loudness, 3D audio DAC/ADC up to 24-bit 192kHz Connectivity Radio...
  5. MarkusThatch

    For Sale Denon RCD-M39 DAB CD Receiver

    For sale is one Denon RCD-M39 DAB CD Receiver, in good working order and good condition (see photo). Includes remote control. £60 including postage. Has USB input for iOS devices, CD player and digital optical input. Bought around 2014, very light use and not currently needed hence sale...
  6. Clock'd 0ne

    For Sale Marantz SA8005 Super Audio CD Player (SACD/CD)

    Black colourway and fully boxed in its original packaging with the remote and all accessories, purchased from another forum member previously. I would describe the condition as near mint, it has not been used a great deal at all; I'm selling it as I switched to an Arcam CD player/amp combo...
  7. B

    Marantz 67se or Roksan Attessa CDT

    I'm considering upgrading my old but working well CD player, Marantz 67se for a Roksan Attessa CD Transport. I was hoping to get a demo in Richer Sounds but they don't have one at my local branch. I'm using the Cambridge Audio CXN V2 as a DAC If I get a noticeable improvement it will be worth...
  8. Ugg10

    HMV 40% off cd/vinyl sale

    As per title, HMV have a 40% off sale on CD and Vinyl. Just picked up Colours II by Between the Buried and Me for £12.79 delivered (on coloured vinyl).
  9. DistortedVision

    Arcam Repair

    The tray in my Arcam CD37 CD player won't open. It plays the CD that's stuck inside and all other functions are working correctly. I read that Arcam now operate a fixed price and expensive repair service so I was wondering if anyone can recommend someone independent?
  10. T

    CD Player tray opening problem

    Hi, I have a 10 year old CD player which has a strange tray opening problem. When I put a CD in, it will seemingly try to read it for a second and then spit the tray back out. If I put in a different CD, the same thing happens, rinse and repeat. If I were to turn it off and return half an hour...
  11. S

    For Sale AUDIOLAD OMNIA £550

    Audiolab Omnia like new Great sound and has streaming playfi and cd player This system has received great reviews have original box Bournemouth collection or can deliver once I have cleared bank transfer (£15 delivery) Have upgraded
  12. S

    Deal Agreed Musical Fidelity Nu-Vista M3 Amp & 3D CD Player - Upgraded

    Musical Fidelity Nu-Vista M3 amplifier and PSU Excellent condition for age, no damages and very minimal wear. Face/front plate no marks. Slight wear on parts of sides/heatsink, barely visible when set up. PSU no marks or damages. £2000. MF Nu-Vista 3D CD player Condition as above, no damages...
  13. M

    For Sale Pioneer BDP LX58

    As new, boxed reference BluRay player and CD transport.
  14. S

    Hi Fi system with record, cd and twin cassette player plus radio and stand alone twin speakers

    Can anyone please recommend if you have fairly recently bought, what in the old days would be termed a midi hi fi system, with record, cd and twin cassette player plus radio, and stand alone twin speakers ? I am looking to replace my Aiwa system bought in 2002 with something similar / like for...
  15. I

    For Sale Reduced! Marantz Melody M-CR612 all-in-one

    Well looked after, Marantz all-in-one network, CD, DAB, FM receiver (Wi-Fi, Bluetooth, HEOS). A lovely unit, selling due to an upgrade. Original box, remote, manual, power lead. Looks new.
  16. zed1015

    Wanted Music Manager for Denon CHR-F103 CD/HDD wanted .

    Music Manager software wanted for the Denon CHR-F103 cd / hard drive player. If anyone out there has a working link to a download , a physical copy to sell or knows where to buy the offending item etc please let me know. Beer tokens await if needed.. Cheers, Rob.
  17. L

    Cd to phone without PC

    Hi.. I have some CDs that I would like to put on my phone without using a laptop. I read an article that said you can buy a transfer device but I have been unable to find one. Can anybody help please
  18. K

    Question ROKSAN KANDY KC-1 CD PLAYER

    Hi guys and girls, I have been given the above cd player, it's awesome but sadly I have no remote control for it, I bought a one for all that does not have the codes, I contacted tech support see below, can anyone please help ? Thanks Steve Thank you for your email. Unfortunately, the model...
  19. LuvCVs

    Question Velodyne DD12

    Hi, just a simple question, with the Velodyne DD12 sub, all the separate box - setup equipment, was a CD with software included? Or was this only the DD12+?
  20. J

    Wanted Used CD player - budget ~80

    Hi I’m looking for a sub 80gbp and working cd player - prefer the Marantz options above (I have a Marantz amp)
Back
Top Bottom