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. EBU






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






3. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics






4. AES






5. 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






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






7. The process of reducing the space required to store data by efficiently encoding the content.






8. 12.33 GB; DS/ML






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






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






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






12. The loudest point of a Full Scale system






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






14. CBR; Codecs encodes data at a constant rate regardless of density of the audio file






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






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






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






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






19. Decibels Full Scale






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






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






22. 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






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






24. Roughly around 1 -130 ft/s






25. Improper (false) sampling of high frequencies that cause much lower frequencies to be produced when the audio is reconstructed; Foldover happens at higher frequencies as harmonics reach levels that exceed the Nyquist limit.






26. 16-Bit; 44.1 kHz; PCM; Stereo






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






28. The amount of energy at each wavelength






29. Defines the number of sample per second taken from a continuous signal to make a discrete signal; Governs the frequency response of digital audio






30. Have odd numbered harmonics






31. 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'






32. 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






33. Process that begins with a fast FFT analysis of the spectra of two input signals - then the multiplication of like frequencies - and IFFT to finalize the process






34. In order to play multiple channels at one time data is buffered as read to disk; Latency happens between play command & beginning of playback






35. 7.95 GB; SS/DL






36. Eight channel digital surround sound system by Dolby






37. 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






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






39. Visual graph that shows how loud a sound is at different frequencies






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






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






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






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






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






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






46. Measure of the amplitude of a longitudinal wave






47. MPEG; Standardizing body of audio coding






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






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






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