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. Measures the highest levels of a signal being recorded or mixed; Monitors for clipping - which occurs at 0dBFS); Does not always reflect perceived volume of signal






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






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






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






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






6. 8- in/8- out on one cable; 25- pin D- sub connector






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






8. The frequency range that is allowed through a filter






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






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






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






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






13. Same as 'aliasing'






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






15. Unit of measurement that is equal to one millionth of a meter






16. 7.95 GB; SS/DL






17. 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






18. 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






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






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






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






22. A drive that can read and write on optical media that hold up to 50 GB on two layers; 24- bit/96 kHz for 8-Channel; 24- bit/192 kHz for 6-Channel






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






24. 12.33 GB; DS/ML






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






26. As sample rate is increased more room is created for a smoother slope of the attenuation band because Nyquist limit extends well beyond range of hearing with each increase






27. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently






28. Root Mean Square; Refers to taking the square root of all instantaneous amplitudes; Takes the average of those squares; (-6 Peak Level is approximately equal to -20 RMS)






29. Method of sampling data at a higher resolution (higher sample rate) as a means of reducing harmonic content during D/A conversion; (x2) oversampling gets rid of all odd harmonic content






30. Psychoacoustic model of data reduction used for general audio compression that aims to transmit only features perceptible to the human ear; Useful for mastering streaming media






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






32. Subtract place values from the decimal number and place ones or zeros in the correct places






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






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






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






36. 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






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






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






39. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values






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






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






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






43. 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






44. The loudest point of a Full Scale system






45. CobraNet; EtherSound; Dante; AVB (currently under development)






46. Uses entropy coding as the basis; Computer data compression algorithm that packages files such as .ZIP & .RAR






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






48. Sample Rate x Bit Depth x # of Channels






49. A time regulator that makes all samples and bits to align when working with interconnected digital devices; Basically a signal that all of the digital devices refer to when operating.






50. Waveform of a pure tone showing simple harmonic motion