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. Governs the frequency response of a digital system; The highest- frequency component that can be captured with a sampling rate; always 1/2 of sampling rate; Also called the limiting frequency






2. 15.9 GB; DS/DL






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






4. Discrete incremental distinctions made between the value of one sample and the next; Breaks down bit depth into a series of evenly spaced intervals






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






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






7. 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






8. 'Capturing' part of digital audio; Never captures a signal perfectly






9. Unit of measurement that is equal to one billionth of a meter






10. (Amplitude Based) Amplitude: Voltage; Quantization; Bit Depth; Quantization Intervals; Quantization Noise; [Signal:Quantization Noise Ratio]; Dither; Dynamic Range






11. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission






12. 1.) Bit Rate x Sample Rate (you'll get b/sec) 2.) Multiply by 60 if converting seconds to minutes 3.) Divide by 8 to convert bits to Bytes and get B/min 4.) Divide by 1 -024 to get KB/min and keep doing it until you get desired bit rate specification






13. A network communications protocol that specifies how machines will exchange data; Uses a broadcast system in which one machine transmits its message on the communication medium and the other machines listen for messages directed to them






14. If a signal is sampled at a rate higher than twice the highest significant signal frequency and at evenly spaced intervals - then the samples contain all the information of the original signal






15. Fractional part of a floating- point number; Also called the mantissa; Defines precision






16. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics






17. The number of compressions or rarefactions in one second; The higher the frequency the more compressions & rarefactions per second; Measured in Hertz






18. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3






19. More accuracy in low amplitudes and less in higher amplitudes






20. Allowance of noise floor below that which is required for the final product






21. Rate at which energy is drawn from a source that produces a flow of electricity in a circuit; Expressed in volts






22. The elapsed time it takes for a packet of data to arrive at its destination; Lagging or pause of an audio signal as digital processing occurs; Can be managed utilizing several forms of 'audio monitoring'






23. The set of rules that computers use to move files from one computer to another on an internet






24. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc






25. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables






26. Smallest interval measurable by a scientific instrument; Defined by bit rate (sample rate x bit depth)






27. Waveform of a pure tone showing simple harmonic motion






28. Only 2 digits used; The value of each place (ones - hundreds - etc.) are as follows from greatest to least: 128 - 64 - 32 - 16 - 8 - 4 - 2 - 1






29. Level above which audible sounds are painful (125 - 130 db)






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






31. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution






32. The loudest point of a Full Scale system






33. Describes various optical disc characteristics including the size and shape of the disc - the size of pits - the speed at which the disc spins - and a multitude of aspects regarding the specifications of the player itself






34. Each bit in the bit depth is equal to a _____ increase in dynamic range






35. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude






36. Eight channel digital surround sound system by Dolby






37. The frequency range that is allowed through a filter






38. Perceptual coding technique that uses louder sounds of a similar frequency to decide what information is to be saved during data reduction






39. 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






40. Based on psychoacoustics - these are the basis of frequency analysis for a perceptual codec;






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






42. 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






43. 1.) Taking a series of evenly- spaced measurements 2.) Signal contains no frequency components higher than half the sample rate






44. Measure of the amplitude of a longitudinal wave






45. Measure of sound pressure over the frequency spectrum - for which a listener perceives a constant loudness when presented with pure steady tones






46. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude






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






48. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks






49. AES






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