Fundamentals of Digital Audio Technology Exam Questions with Answers
What digital audio conversion parameter is responsible for dynamic range size/resolution? - Answers bit
depth
Sample rate - Answers the number of measurements (samples) that are periodically taken over the
course of a second. (time element)
What is better- high or low sample rate? why? - Answers High sample rate allows for more samples to
be taken more frequently, therefore providing a more accurate composite of original source.
the sample rate of a system determines its overall ______. - Answers bandwidth
bit depth/resolution - Answers number of bits (0's and 1's) that determines number of available values
for quantization
A recording made at a higher sample rate will be capable of ____. - Answers storing a wider range of
frequencies.
Quantization - Answers (amplitude component) translates the voltage levels of a continuous analog
signal into binary digits (bits).
Why are higher bit resolutions better? - Answers Adds internal headroom at the bit level and help to
reduce errors in level and performance at low-level resolutions.
reduces erros that might accumulate within the LSB
Explain the relationship between bit-depth and dynamic range. - Answers bit depth is directly related to
the number of quantization steps in the bitstream. Therefore, quantization is related to signal-to-error,
and overall dynamic range. Higher rates increase headroom.
If the depth is too low, quantization errors will occur, leading to distortion. Too high of a depth might
create a very large file.
Nyquist theorem - Answers In order for the desired frequency bandwidth to be faithfully encoded in the
digital domain, the selected sample rate must be at least twice as high as the highest frequency to be
recorded.
A sample rate of 20Hz will have a Nyquist Frequency of ____ and successfully record frequencies up to
_____. - Answers 10 Hz, 10 Hz
Why is Nyquist theorem useful? - Answers If frequencies greater than twice the sample rate are allowed
into sampling process, the samples won't be able to accurately capture higher frequencies and will
record "alias" (false) frequencies, heard as harmonic distortion.
What digital audio conversion parameter is responsible for dynamic range size/resolution? - Answers bit
depth
Sample rate - Answers the number of measurements (samples) that are periodically taken over the
course of a second. (time element)
What is better- high or low sample rate? why? - Answers High sample rate allows for more samples to
be taken more frequently, therefore providing a more accurate composite of original source.
the sample rate of a system determines its overall ______. - Answers bandwidth
bit depth/resolution - Answers number of bits (0's and 1's) that determines number of available values
for quantization
A recording made at a higher sample rate will be capable of ____. - Answers storing a wider range of
frequencies.
Quantization - Answers (amplitude component) translates the voltage levels of a continuous analog
signal into binary digits (bits).
Why are higher bit resolutions better? - Answers Adds internal headroom at the bit level and help to
reduce errors in level and performance at low-level resolutions.
reduces erros that might accumulate within the LSB
Explain the relationship between bit-depth and dynamic range. - Answers bit depth is directly related to
the number of quantization steps in the bitstream. Therefore, quantization is related to signal-to-error,
and overall dynamic range. Higher rates increase headroom.
If the depth is too low, quantization errors will occur, leading to distortion. Too high of a depth might
create a very large file.
Nyquist theorem - Answers In order for the desired frequency bandwidth to be faithfully encoded in the
digital domain, the selected sample rate must be at least twice as high as the highest frequency to be
recorded.
A sample rate of 20Hz will have a Nyquist Frequency of ____ and successfully record frequencies up to
_____. - Answers 10 Hz, 10 Hz
Why is Nyquist theorem useful? - Answers If frequencies greater than twice the sample rate are allowed
into sampling process, the samples won't be able to accurately capture higher frequencies and will
record "alias" (false) frequencies, heard as harmonic distortion.
