Question 1

What is audio sample rate?

Accepted Answer

How many samples per second in digital audio. CD quality: 44.1 kHz. Professional: 48, 96, or 192 kHz.

Question 2

Why is 44.1 kHz standard?

Accepted Answer

Nyquist theorem: sample rate must be 2× highest frequency. Human hearing: ~20 kHz, so 44.1 kHz covers it.

Question 3

What's the relationship between frequency and wavelength?

Accepted Answer

They're inversely related: wavelength × frequency = wave speed. For sound in air: wavelength (m) ≈ 343 / frequency (Hz).

Question 4

Why use Hz vs RPM?

Accepted Answer

Hz (cycles per second) is universal for waves and oscillations. RPM (revolutions per minute) is more intuitive for rotating machinery and engines.

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