Nyquist Frequency

Digital audio’s speed limit: the highest frequency a sample rate can represent without lying.

Core Principles & Analysis

• Sampling at 44.1 kHz, the CD standard, captures content up to 22.05 kHz — just past human hearing.
• Frequencies above the limit fold back as aliases, which is why converters filter before sampling.
• The principle is the Nyquist–Shannon sampling theorem, the founding law of digital signal processing.

Specifications & Metrics

• FREQUENCY: ½ × sample rate