Which statement is true about common sample rates?

• A. They define the bit depth
• B. They are common sample rates used in digital audio.
• C. They are the same as bit rates
• D. They are not used in digital audio

Answer: (B)

Common sample rates are the standard frequencies used when converting analog sound to digital, such as 44.1 kHz, 48 kHz, and 96 kHz. These rates are widely adopted across audio CDs, film and video, streaming, and professional audio, which is why the statement about them being common sample rates used in digital audio is true. The sample rate determines how many samples per second are taken from the waveform and thus influences the highest frequency that can be accurately represented (Nyquist limit). This concept is separate from bit depth, which controls how precisely each sample's amplitude is recorded, and from bit rate, which is the total data produced per second. The other options don’t fit because they misstate the relationship between sample rate and bit depth or bit rate, or claim they aren’t used in digital audio.