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A digital audio signal may be stored or transmitted. 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. The digital signal may be altered through digital signal processing, where it may be filtered or have effects applied.
1989: Test broadcasts for NICAM stereo digital audio for broadcast TV began in the UK. 1990: Digital radio begins in Canada, using the L-Band. [51] 1991: Alesis Digital Audio Tape is a tape format used for simultaneously recording eight tracks of digital audio at once, onto Super VHS magnetic tape – a format similar to that used by consumer VCRs.
Digital and analog differ in both the methods of transfer and storage, as well as the behavior exhibited by the systems due to these methods. The dynamic range capability of digital audio systems far exceeds that of analog audio systems. Consumer analog cassette tapes have a dynamic range of between 50 and 75 dB.
This lets the audio data be stored and transmitted by a wider variety of media. Digital recording stores audio as a series of binary numbers (zeros and ones) representing samples of the amplitude of the audio signal at equal time intervals, at a sample rate high enough to convey all sounds capable of being heard.
One major uncompressed audio format, LPCM, is the same variety of PCM as used in Compact Disc Digital Audio and is the format most commonly accepted by low level audio APIs and D/A converter hardware. Although LPCM can be stored on a computer as a raw audio format, it is usually stored in a .wav file on Windows or in a .aiff file on macOS.
Digital audio is sound (often music or speech) which is recorded (born-digital) or converted from analog sources and stored in a digital format. Digital audio can be stored on a variety of storage media, including compact disc, audio CD, audio DVD, DAT tape, or as a computer file. Playing equipment decodes the stored signal.
Integer PCM audio data is typically stored as signed numbers in two's complement format. [2] ... Bit depth is a fundamental property of digital audio implementations ...
Cinema Digital Sound, an optical format which was the first commercial digital sound format, used between 1990 and 1992; Fantasound. This was a system developed by RCA and Disney Studios with a multi-channel soundtrack recorded on a separate strip of film from the picture. It was used for the initial release of Walt Disney's Fantasia (1940)