Bit depth in audio refers to the number of bits used to represent the amplitude of each sample in a digital audio file. In other words, it determines the resolution of the audio signal.The bit depth is usually expressed in bits per sample, and common values are 16 bits, 24 bits, and 32 bits. The higher the bit depth, the greater the dynamic range of the audio signal and the more accurately it can be represented.
For example, with a bit depth of 16 bits, the audio signal can be represented by 65,536 discrete amplitude levels, while with a bit depth of 24 bits, the audio signal can be represented by 16,777,216 discrete amplitude levels.
Having a higher bit depth can lead to a higher signal-to-noise ratio and less distortion in the audio signal.
Sample rate, also known as sampling rate, is another important parameter that describes digital audio. It refers to the number of samples of an analog audio signal that are taken per second to create a digital representation of the signal.
The sample rate is usually expressed in Hertz (Hz), and common values are 44.1 kHz, 48 kHz, and 96 kHz. The higher the sample rate, the more accurately the digital representation can capture the nuances of the original analog signal.
For example, a sample rate of 44.1 kHz means that the analog audio signal is sampled 44,100 times per second, while a sample rate of 96 kHz means that the analog audio signal is sampled 96,000 times per second.
A higher sample rate can provide a greater frequency response and better fidelity to the original sound
Headroom in audio refers to the amount of available space between the maximum level of the audio signal and the maximum level that a system can handle without distortion or clipping.
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