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






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






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






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






6. 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






7. 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






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






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






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






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






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






13. 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






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






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






17. 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






18. 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






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






20. Algorithm uses matrix of a mid/side microphone pair to determine a side signal & that signal is reduced then distributed as code in stereo






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






22. Allows for an internal sample rate at multiples of the input and output rates; Alleviates the need for steep 'brickwall' filters; Often combined with internal '1- bit' processing; Increases smoothing effect






23. Computer program or device capable of encoding and/or decoding a digital data stream with the end result being a reduced file size






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






25. MPEG; Standardizing body of audio coding






26. Represents the amplitude component of the digital sampling process; Technique of incrementing a continuous analog event into a discrete set of binary digits (bits)






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






28. 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






29. 8.75 GB; DS/SL






30. 8- in/8- out on one cable; 25- pin D- sub connector






31. Digital (binary) measurements of how long each pulse is either on or off; Width of increasing voltage or decreasing voltage is assigned a 1 or 0 respectively






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






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






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






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






36. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'






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






38. Inner ear component that attaches to the stapes and helps to decrease the amplitude of vibrations; Causes the masking phenomenon






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






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






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






42. 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






43. Number of bits per second processed when sampling sound; (Sampling Rate x Bit Depth) = Resolution






44. 'Reconstructing' part of digital audio






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






46. Same as 'aliasing'






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






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






49. 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






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