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






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






3. 'Reconstructing' part of digital audio






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






5. EBU






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






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






8. 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






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






10. Very selective method of lowering buffer levels by halting different levels of audio processing






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






12. Used as the main disc from which other discs are made; Composed of ground glass with a very fine photoresistor layer; An imaging laser burns pit and land patterns in preparation for duplication






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






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






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






17. 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






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






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






20. 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






21. A digital filter's time domain output sequence when the input is a single sample is input






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






23. Serial Copy Management System; main difference between AES3 & S/PIDF






24. 16-Bit; 44.1 kHz; PCM; Stereo






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






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






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






28. 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






29. Reference voltage determined by summing the voltage values of a predetermined number of previous samples; Numbers of 1 in row = waveform peak; Numbers of 0 in row = waveform trough; Basis of Sony's Direct Stream Digital (DSD)






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






31. The continuous loss of signal strengths as a signal travels through a medium






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






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






34. MPEG; Standardizing body of audio coding






35. Measure of the amplitude of a longitudinal wave






36. 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






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






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






39. 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






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. The difference in volume between the loudest and quietest sounds of a source






42. 15.9 GB; DS/DL






43. The amount of energy at each wavelength






44. 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






45. Channels are processed one at a time and the results are stored on multiple CPU buffers that alternately send data as DAW requests the data for playback; First few seconds are relayed to the buffer prior to processing and playback and it continuously






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






47. EDL; Final list of samples used in the audio editing process; Identified by time code






48. Data is transmitted over fiber optic lines; Uses a TOSLINK connecter instead of an RCA type; Can transmit multi- channel audio; Not susceptible to ground hum and loops; Able to support far higher rates of data transfer over greater distances than coa






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






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