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. Cable used to transmit data; Inner cable is surrounded by a plastic insulator - which is surrounded by a wire mesh conductor that insulates the internal signal wire from external interference and an outer casing that functions as a ground






2. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'






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






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






5. Same as 'aliasing'






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






7. Sum of all harmonics; Sum of sine and cosine waves which have frequencies f - 2f - 3f - 4f...






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






9. A method of representing real numbers using a mantissa and an exponent






10. 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






11. Used when the reference pressure of a sound is 20 microPa (0.00002); Sound Pressure Level; Measure of amplitude






12. 8.75 GB; DS/SL






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






14. Full Scale; Type of metering that measures level in digital recording system; Recording and Mixing levels should NEVER exceed 0dB FS in digital audio or clipping will occur






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






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






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






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






19. Eight channel digital surround sound system by Dolby






20. 7.95 GB; SS/DL






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






22. The act of a frequency swinging back and forth with a steady - uninterrupted rhythm






23. Data transmission protocol over which computer network traffic travels; Poorly suited to real- time transmission but numerous attempts have been made to harness the technology because of its flexible routing; Uses simple Cat5 cabling; Resists interfe






24. Circuit that interprets the meaning of the symbols as they were chosen and arranged by the encode






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






26. 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






27. The frequency above or below which attenuation begins in a filter circuit






28. 4.38 GB; SS/SL






29. Ratio of magnitude of the analytical signal to the magnitude of the background noise signal






30. A situation where a calculated value cannot fit into the number of digits reserved for it






31. Found that aliasing was always a problem no matter how fast you sample; Less data recorded but more accurate; 2 samples per wave length.






32. Series of dots and dashes representing the letters of the alphabet; Most common letters are represented by the shortest dots and dashes; Example of entropy coding






33. Have odd numbered harmonics






34. Apple Lossless; Windows Media Lossless; DTS HD Master Audio; Dolby True HD; FLAC






35. MPEG; Standardizing body of audio coding






36. 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'






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






38. Built into DAWs; Bits are added when signals are mixed together to avoid clipping






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






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






41. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector






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






43. The mathematics - algorithms - and the techniques used to manipulate signals after they have been converted to digital form






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






45. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks






46. Multi-Bit Words; (Pulse Code Modulation)






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






48. Deviation from a normal - steady pulse or tick of a clock that contributes to misrepresentation of a signal; Result of small timing irregularities that become magnified during the transmission of digital signals as the signals are passed from one dev






49. 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






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