Test your basic knowledge |

Digital Audio

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude






2. Eliminates frequencies above the Nyquist limit from becoming samples; Occurs prior to quantization






3. DAW's and software must buffer when converting or bouncing and this latency can add up if not monitored






4. High Pressure - Part of a longitudinal wave where the particles of the medium are close together






5. Occurs as data is assembled into meaningful bits or information and as left & right channels are separated






6. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital






7. Toshiba developed digital audio interface utilizes fiber optics as a transmission medium.






8. The art of deciding where to place a processor in signal flow based on how that processor will be influenced by the other processors in the path






9. Industry Standards: -6 dB Peak = -20 RMS Meter






10. Having a repeated succession of waves or curves as in a sound waveform






11. Decibels Full Scale






12. A frequency specified for a filter (digital or electronic) the marks the point at which the frequency content of a signal is altered +/- 3dB






13. Joint-Stereo Technique; Since the human brain is unable to localize sounds at high frequencies well sounds above 9 kHz threshold are encoded in mono






14. Softest sound that can be heard by the average human ear (0 dB)






15. How Loud (Y-Axis) & How Fast (X-Axis)






16. Accuracy with which an electronic system reproduces the sound or image of its input signal






17. Contains all even and odd harmonics associated with a fundamental tone - making it a rich source for modeling other sounds; Amplitude of each overtone decreases exponentially as a ratio of the harmonic's frequency to that of the fundamental






18. Difference in brightness between land and pit on a CD Physical Format






19. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)






20. Very quiet digital amplifier that produces a series of output pulses with the audio signal coded the same as the width of the output pulses; Pulses are used to represent wave forms and are either on or off; Intense signals have long pulses with short






21. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution






22. French mathematician that noted that any complex sound can be broken down into a series of component pure tones






23. 8.75 GB; DS/SL






24. Branch of psychology concerned with the subjective perception of sound






25. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience






26. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage






27. EBU






28. Sony sigma- delta modulation based technology that bypasses the decimation and interpolation steps found in PCM converters






29. Same as 'aliasing'






30. Data reduction technique that does not effect quality of original audio; No effect on original quality; Typically around 50% reduction; Exact reconstruction of digital code for the audio signal






31. The frequency range that is allowed through a filter






32. Sony and Philips optical disc format; Utilizes sigma delta DSD to offer higher resolution; 1- bit; 2.8224 MHz; 6-Channel






33. 15.9 GB; DS/DL






34. Most significant lossless coding technique in current use; Measure of disorder in which long strings of data are represented by short symbols and uses the shortest symbols to represent the most common repetitive audio data maximizing data reduction






35. Measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form); There must be a minimum of 2 samples for each cycle in a waveform






36. Electromagnetic receptor that detects the radiation known as visible light






37. (Time Based) Frequency: Aliasing; Anti-Aliasing Filter; Sample Rate; Nyquist Limit






38. Mixing data and control characters in a single operation






39. Stores only one copy of a stereo signal and assigns it to both channels in order to save 50% of original bandwidth






40. Increases or decreases the digital signal so that the loudest sample is brought up to 0dBfs; Uses all bits from dynamic range and makes it even from track to track






41. A sample- by- sample operation on two signals






42. When recording you want the smallest buffer available; When mixing you want the largest buffer available






43. Six channel (five speakers and one subwoofer for bass) digital surround sound system by Dolby






44. Leaving space at beginning and ending of song for data crunching during mastering; Last step in mastering process






45. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates






46. 7.95 GB; SS/DL






47. Samples are duplicated and the playback sampling rate correspondingly increased; Significantly raises the Nyquist limit to a range well beyond human hearing; Processing 'pushes' the distortion resulting from quantization error into these higher frequ






48. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!






49. Method used in digital recording and reproduction in which a signal is sampled at various points and the resulting value is translated into binary numbers






50. Data reduction technique that selectively removes original information in order to significantly reduce the file size; Some data is lost; Files can be reduced up to 99% in size (90% with no perceived sound quality loss); Bit rate effects the perceive