.cda is a common

filename extension A filename extension, file name extension or file extension is a suffix to the name of a computer file (for example, .txt, .mp3, .exe) that indicates a characteristic of the file contents or its intended use. A filename extension is typically d ...

denoting a small (44

byte The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable un ...

)

stub file A stub file is a computer file that appears to the user to be on disk and immediately available for use, but is actually held either in part or entirely on a different storage medium. When a stub file is accessed, device driver software intercep ...

generated by

Microsoft Windows Windows is a Product lining, product line of Proprietary software, proprietary graphical user interface, graphical operating systems developed and marketed by Microsoft. It is grouped into families and subfamilies that cater to particular sec ...

for each audio track on a standard "Red Book"

CD-DA Compact Disc Digital Audio (CDDA or CD-DA), also known as Digital Audio Compact Disc or simply as Audio CD, is the standardization, standard format for audio compact discs. The standard is defined in the ''Rainbow Books, Red Book'' technical s ...

format audio CD as defined by the Table of Contents (ToC) (within the lead-in's

subcode Subcode or subchannel data (called ''control bytes'' in the CD-ROM specification) is data contained in a compact disc (CD) in addition to digital audio or user data, which is used for control and playback of the CD. The original specification was ...

). These files are shown in the directory for the CD being viewed in the format ''Track##.cda'', where ## is the number of each individual track. The .cda files do not contain the actual

PCM Pulse-code modulation (PCM) is a method used to Digital signal (signal processing), digitally represent analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio application ...

sound wave data, but instead tell where on the disc each track starts and stops. If the file is "copied" from the CD to a computer, it cannot be used on its own because it is only a shortcut to part of the disc. However, some audio editing and CD creation programs will, from the user's perspective, load .cda files as though they are actual audio data files, and allow the user to listen to them.

Organization of a CDA file

The size of a CDA file being fixed, as well as its organization, there is always only one and only chunk, named "CDDA" (meaning

compact disc The compact disc (CD) is a Digital media, digital optical disc data storage format co-developed by Philips and Sony to store and play digital audio recordings. It employs the Compact Disc Digital Audio (CD-DA) standard and was capable of hol ...

for

digital audio Digital audio is a representation of sound recorded in, or converted into, digital signal (signal processing), digital form. In digital audio, the sound wave of the audio signal is typically encoded as numerical sampling (signal processing), ...

). The identifier created by Windows is used by the

Windows 95 Windows 95 is a consumer-oriented operating system developed by Microsoft and the first of its Windows 9x family of operating systems, released to manufacturing on July 14, 1995, and generally to retail on August 24, 1995. Windows 95 merged ...

and

Windows 98 Windows 98 is a consumer-oriented operating system developed by Microsoft as part of its Windows 9x family of Microsoft Windows operating systems. It was the second operating system in the 9x line, as the successor to Windows 95. It was Software ...

CD drive (cdplayer.exe). This player cannot connect to

FreeDB Freedb was a database of User-generated content, user-submitted compact disc track listings, where all the content was under the GNU General Public License. To look up CD information over the Internet, a client program calculated a hash function fr ...

CDDB CDDB, short for Compact Disc Database, is a database for application software, software applications to look up audio CD (compact disc) information over the Internet. This is performed by a client which calculates a (nearly) unique disc Identifier ...

. So that it can display the artist name and song title, you have to manually enter this information in the cdplayer.ini file (in the Windows installation directory), in a section named after that identifier. This identifier has no relation to the DiscId used by FreeDB or CDDB, it is a purely Microsoft creation, for the above use. The position and length of the tracks use frames as the unit. There are 75 frames per

second The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of U ...

. This is the smallest block of data that can be read from an audio CD, corresponding to a sector of the CD. All the information which requires several bytes is coded with the order-byte Intel (

Little-endian '' Jonathan_Swift.html" ;"title="Gulliver's Travels'' by Jonathan Swift">Gulliver's Travels'' by Jonathan Swift, the novel from which the term was coined In computing, endianness is the order in which bytes within a word (data type), word of d ...

Software that uses .cda format

Windows Media Player Windows Media Player (WMP, officially referred to as Windows Media Player Legacy to retronym, distinguish it from Windows Media Player (2022), the new Windows Media Player introduced with Windows 11) is the first media player (application soft ...

Media Player Classic Media Player Classic (MPC), Media Player Classic - Home Cinema (MPC-HC), and Media Player Classic - Black Edition (MPC-BE) are a family of free and open-source, compact, lightweight, and customizable media players for 32- and 64-bit Microsoft Wi ...

KMPlayer K-Multimedia Player (commonly known as The KMPlayer, KMPlayer or KMP) is an Adware-supported media player for Windows, android and iOS that can play most current audio and video formats, including VCD, DVD, AVI, MP4, MPG, DAT, OGM, VOB, ...

AIMP AIMP is a freeware audio player for Windows and Android, originally developed by Russian developer Artem Izmaylov (). It supports a variety of audio codecs, and includes tools to convert audio files and edit their metadata. It also has the c ...

Player *

Winamp Winamp is a media player (software), media player for Microsoft Windows originally developed by Justin Frankel and Dmitry Boldyrev by their company Nullsoft, which they later sold to AOL in 1999 for $80 million. It was then acquired by Rad ...

Player *

GOM Player GOM Player is a media player for Microsoft Windows, developed by GOM & Company. With more than 100 million downloads, it is also known as the most used player in South Korea. Its main features include the ability to play some broken media files ...

Foobar2000 foobar2000 (often abbreviated as fb2k or f2k) is a freeware audio player for Microsoft Windows, iOS, Android, macOS, and formerly Windows Phone, developed by Peter Pawłowski. It has a modular design, which provides user flexibility in c ...

XMPlay XMPlay is a freeware audio player for Windows. Initially released in 1998, it is often used as a reference player for tracker audio files. Overview Developed by ''Un4seen Developments'' in 1998, it originally only supported the XM file form ...

Zune Zune was a brand of digital media products and services that was marketed by Microsoft from November 2006 until it was discontinued in June 2012. Zune consisted of a line of portable media players, a music subscription service known as Zune Music ...

for Windows *

iTunes iTunes is a media player, media library, and mobile device management (MDM) utility developed by Apple. It is used to purchase, play, download and organize digital multimedia on personal computers running the macOS and Windows operating s ...

* MusicMatch Jukebox

References

External links

File format
{{Webarchive, url=https://web.archive.org/web/20061111223650/http://www.moon-soft.com/program/FORMAT/sound/cda.htm , date=2006-11-11 Computer file formats Compact disc

Organization of a CDA file

Software that uses .cda format

See also

References

External links