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The Nyquist–Shannon sampling theorem states that a sampling rate of more than twice the maximum frequency of the signal to be recorded is needed, resulting in a required rate of greater than 40 kHz. The exact sampling rate of 44.1 kHz was inherited from PCM adaptors which was the most affordable way to transfer data from the recording studio ...
[81] [82]: sec. 2.6 An audio CD can represent frequencies up to 22.05 kHz, the Nyquist frequency of the 44.1 kHz sample rate. [ 83 ] There was a long debate over the use of 16-bit (Sony) or 14-bit (Philips) quantization , and 44,056 or 44,100 samples/s (Sony) or approximately 44,000 samples/s (Philips).
The decline in CD sales has slowed in recent years; in 2021, CD sales increased in the US for the first time since 2004, [63] with Axios citing its rise to "young people who are finding they like hard copies of music in the digital age". [64] It came at the same time as both vinyl and cassette reached sales levels not seen in 30 years. [65]
CD audio, for example, has a sampling rate of 44.1 kHz (44,100 samples per second), and has 16-bit resolution for each stereo channel. 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 ...
The DVD format uses the 48 kHz sampling rate, and its doublings. In digital audio, 48,000 Hz (also represented as 48 kHz or DVD Quality) is a common sampling rate. It has become the standard for professional audio and video. 48 kHz is evenly divisible by 24, a common frame rate for media, such as film, unlike 44.1 kHz. [i]
Those 74 minutes come from the maximum playtime that the Red Book (audio CD standard) specifies for a digital audio CD (CD-DA); although now, most recordable CDs can hold 80 minutes worth of data. The DVD and Blu-ray discs hold a higher capacity of data, so reading or writing those discs in the same 74-minute time-frame requires a higher data ...
For music-quality audio, 44.1 and 48 kHz sampling rates are the most common. Master recording may be done at a higher sampling rate (i.e. 88.2, 96, 176.4 or 192 kHz). High-resolution PCM recordings have been released on DVD-Audio (also known as DVD-A), DualDisc (utilizing the DVD-Audio layer), or High Fidelity Pure Audio on Blu-ray.
1987; 38 years ago () Digital Audio Tape ( DAT or R-DAT ) is a signal recording and playback medium developed by Sony and introduced in 1987. [ 1 ] In appearance it is similar to a Compact Cassette , using 3.81 mm / 0.15" (commonly referred to as 4 mm) magnetic tape enclosed in a protective shell, but is roughly half the size at 73 mm × 54 mm ...