Digital audio

digital musicaudiodigitaldigital sounddigital downloaddigital audio recorderdigitallyaudio dataaudio interfacedigital recording
Digital audio is sound that has been recorded in, or converted into, digital form.wikipedia
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Audio bit depth

24-bitbit depthresolution
For example, in CD audio, samples are taken 44100 times per second each with 16 bit sample depth.
In digital audio using pulse-code modulation (PCM), bit depth is the number of bits of information in each sample, and it directly corresponds to the resolution of each sample.

Compact Disc Digital Audio

Audio CDCDRed Book
For example, in CD audio, samples are taken 44100 times per second each with 16 bit sample depth.
The standard also specifies the form of digital audio encoding: 2-channel signed 16-bit Linear PCM sampled at 44,100 Hz.

Sound recording and reproduction

recordingrecordedrecordings
Digital audio is also the name for the entire technology of sound recording and reproduction using audio signals that have been encoded in digital form.
Digital recording and reproduction converts the analog sound signal picked up by the microphone to a digital form by the process of sampling.

Pulse-code modulation

PCMlinear PCMLPCM
In a digital audio system, an analog electrical signal representing the sound is converted with an analog-to-digital converter (ADC) into a digital signal, typically using pulse-code modulation.
It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications.

Podcast

podcastspodcastingpodcaster
Digital audio technologies are used in the recording, manipulation, mass-production, and distribution of sound, including recordings of songs, instrumental pieces, podcasts, sound effects, and other sounds.
A podcast or generically netcast, is an episodic series of digital audio or video files which a user can download in order to listen to. It is often available for subscription, so that new episodes are automatically downloaded via web syndication to the user's own local computer, mobile application, or portable media player.

Phonograph record

vinyl7LP
Before digital audio, the music industry distributed and sold music by selling physical copies in the form of records and cassette tapes.
By the 1980s, digital media, in the form of the compact disc, had gained a larger market share, and the vinyl record left the mainstream in 1991.

Radio broadcasting

radio stationsradio stationradio
The sounds are then stored on an analog medium such as magnetic tape, or transmitted through an analog medium such as a telephone line or radio.
The signal types can be either analog audio or digital audio.

Aliasing

aliasedaliastemporal aliasing
Analog signals that have not already been bandlimited must be passed through an anti-aliasing filter before conversion, to prevent the aliasing distortion that is caused by audio signals with frequencies higher than the Nyquist frequency (half the sampling rate).
Aliasing can occur in signals sampled in time, for instance digital audio, and is referred to as temporal aliasing.

Sampling (signal processing)

sampling ratesamplingsample rate
The ADC runs at a specified sampling rate and converts at a known bit resolution.
Digital audio uses pulse-code modulation and digital signals for sound reproduction.

MP3

.mp3MP3 downloadmp3s
Audio data compression techniques, such as MP3, Advanced Audio Coding, Ogg Vorbis, or FLAC, are commonly employed to reduce the file size.
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio.

Advanced Audio Coding

AACAAC/AAC+/eAAC+.aac
Audio data compression techniques, such as MP3, Advanced Audio Coding, Ogg Vorbis, or FLAC, are commonly employed to reduce the file size.
Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression.

FLAC

.flacFree Lossless Audio CodecFLAC
Audio data compression techniques, such as MP3, Advanced Audio Coding, Ogg Vorbis, or FLAC, are commonly employed to reduce the file size.
FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, and is also the name of the free software project producing the FLAC tools, the reference software package that includes a codec implementation.

Audio and video interfaces and connectors

digital audio interfaceA/VA/V port
Digital audio can be carried over digital audio interfaces such as AES3 or MADI.
For digital audio and digital video, this can be thought of as defining the physical layer, data link layer, and most or all of the application layer.

AES3

AES/EBUAESdigital
Digital audio can be carried over digital audio interfaces such as AES3 or MADI.
AES3 (also known as AES/EBU) is a standard for the exchange of digital audio signals between professional audio devices.

MADI

Multichannel Audio Digital Interface
Digital audio can be carried over digital audio interfaces such as AES3 or MADI.
Multichannel Audio Digital Interface (MADI) or AES10 is an Audio Engineering Society (AES) standard that defines the data format and electrical characteristics of an interface that carries multiple channels of digital audio.

Audio over Ethernet

audio-over-EthernetEthernetEthernet-networked
Digital audio can be carried over a network using audio over Ethernet, audio over IP or other streaming media standards and systems.
In audio and broadcast engineering, Audio over Ethernet (sometimes AoE—not to be confused with ATA over Ethernet) is the use of an Ethernet-based network to distribute real-time digital audio.

Streaming media

streamingstreamedstreaming video
Digital audio can be carried over a network using audio over Ethernet, audio over IP or other streaming media standards and systems.
A client end-user can use their media player to start playing the digital video content or listens to digital audio content before the entire file has been transmitted.

Computer

computerscomputer systemdigital computer
This digital signal can then be recorded, edited, modified, and copied using computers, audio playback machines, and other digital tools.

Thomas Stockham

Dr. Thomas G. StockhamDr. Thomas G. Stockham Jr.Dr. Thomas G. Stockham, Jr
The first 16-bit PCM recording in the United States was made by Thomas Stockham at the Santa Fe Opera in 1976, on a Soundstream recorder.
Thomas Greenway Stockham (December 22, 1933 – January 6, 2004) was an American scientist who developed one of the first practical digital audio recording systems, and pioneered techniques for digital audio recording and processing as well.

Soundstream

Soundstream Inc.
The first 16-bit PCM recording in the United States was made by Thomas Stockham at the Santa Fe Opera in 1976, on a Soundstream recorder.
Soundstream Inc. was the first audiophile digital audio recording company, providing commercial services for recording and computer-based editing.

Denon

Denon CD DJ players (DJ SC2900)
Commercial digital recording was pioneered in Japan by NHK and Nippon Columbia and their Denon brand, in the 1960s.
Denon is a Japanese electronics company that was involved in the early stages of development of digital audio technology, while specializing in the manufacture of high-fidelity professional and consumer audio equipment.

Analog signal

analoganalogueanalogue signal
In a digital audio system, an analog electrical signal representing the sound is converted with an analog-to-digital converter (ADC) into a digital signal, typically using pulse-code modulation.
Digital audio

Digital Audio Stationary Head

DASHSony 3324 24-track digital tape recorderSony 3348 HR
Popular professional digital multitrack recorders produced by Sony and Mitsubishi in the early 1980s helped to bring about digital recording's acceptance by the major record companies.
The Digital Audio Stationary Head or DASH standard is a reel-to-reel, digital audio tape format introduced by Sony in early 1982 for high-quality multitrack studio recording and mastering, as an alternative to analog recording methods.

Hard disk recorder

direct to disk recordingdirect-to-disk recordingHard Disk Recording
Hard disk recorder
A hard disk recorder (HDR) is a system that uses a high-capacity hard disk to record digital audio or digital video.

USB flash drive

flash driveUSB driveflash drives
Digital audio can be stored on a CD, a digital audio player, a hard drive, a USB flash drive, or any other digital data storage device.
Digital audio files can be transported from one computer to another like any other file, and played on a compatible media player (with caveats for DRM-locked files).