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






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






4. 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






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






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






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






8. Contains all even and odd harmonics associated with a fundamental tone - making it a rich source for modeling other sounds; Amplitude of each overtone decreases exponentially as a ratio of the harmonic's frequency to that of the fundamental






9. AAC (Advanced Audio Coding); MP3; RA; WMA; OGG Vorbis; Dolby Digital/AC-3; DTS; ADPCM






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






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






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






13. 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






14. 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






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






16. 7.95 GB; SS/DL






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






18. Anytime bit depth is reduced the gap gets bigger so more dithering is required






19. 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






20. The frequency range that is allowed through a filter






21. 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'






22. 8.75 GB; DS/SL






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






24. Reduces the percieved distortion due to quantization error; Low level white noise source is introduced to make the profile of the quantization 'noise' more irregular; Useful when reducing the number of bits per word in a signal (i.e. when converting






25. 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.






26. The more bits allocated during quantization - the more accurate the measurement






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






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






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






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






31. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits






32. Signal voltage is relayed to a register from sample- and - hold circuit; Holds reference frequencies in binary form that decrease in value; Finds approximated value & assigns binary number accordingly






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






34. EBU






35. 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)






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






37. 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






38. Signal conversions are mixed with playback tracks resulting in near-zero latency






39. Measure of the amplitude of a longitudinal wave






40. Measuring equipment in A/D conversion that processes voltage and provides a value for that voltage






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






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






43. Reduces A/D sample rate from the oversampled rate to nominal rate by turning series of one- bit samples into a series of multi- bit PCM samples; (ex. => 2.8MHz sample rate converted to 44.1kHz and simultaneously converts 1-Bit samples to multi- bit);






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






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






46. 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






47. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound






48. 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






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






50. The difference between the analog value and the approximated digital value due to the 'rounding' that occurs while converting the analog signal to digital






Can you answer 50 questions in 15 minutes?



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