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






2. 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






3. 12.33 GB; DS/ML






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






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






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






7. 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






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






9. Data reduction technique that does not effect quality of original audio; No effect on original quality; Typically around 50% reduction; Exact reconstruction of digital code for the audio signal






10. 'Reconstructing' part of digital audio






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






12. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating






13. Removes high frequency images and noise and smoothes the stair case output coming from of the sample and hold circuit; Also called a SMOOTHING FILTER






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






15. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits






16. Leaving space at beginning and ending of song for data crunching during mastering; Last step in mastering process






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






18. 1.) Taking a series of evenly- spaced measurements 2.) Signal contains no frequency components higher than half the sample rate






19. 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






20. 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






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






22. 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






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






24. EBU






25. 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






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






27. 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






28. Splits the input signal and mixes it with an analog copy so that no latency is present






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






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






31. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution






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






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






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






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






36. Measure of the amplitude of a longitudinal wave






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






38. MPEG; Standardizing body of audio coding






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






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






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






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






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






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






45. 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






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






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






48. 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






49. The loudest point of a Full Scale system






50. High channel count; 64 channels on one cable; Coaxial cable with BNC connector or fiber optic with ST1 connector