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Collaboration, Voice & AV · Foundational

Bit Depth

The number of bits used to represent each digital audio sample, determining resolution and dynamic range.

Definition

Each additional bit adds about 6 dB of dynamic range, so 16-bit audio has about 96 dB and 24-bit about 144 dB of theoretical range. Professional AV uses 24-bit audio for headroom. Video bit depth (8-bit, 10-bit) refers to color levels per channel.

Example

A 24-bit Dante stream gives plenty of headroom for live microphone mixing.

Exam tip

Use the 6 dB per bit rule for dynamic range questions.

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