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. Circuit that seizes voltage values with each tick of an A/D device's internal clock






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






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






5. 16-Bit; 44.1 kHz; PCM; Stereo






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






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






8. (AES/EBU); 110O - 2- channel balanced digital audio cable with an XLR connection; NOT a mic cable!!






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






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






11. 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






12. 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






13. Mixing data and control characters in a single operation






14. 12.33 GB; DS/ML






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






16. 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






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






18. 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.






19. Same as 'aliasing'






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






21. 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






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






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






25. 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






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






27. 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






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






29. 4.38 GB; SS/SL






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






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






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






33. 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






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






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






36. 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);






37. 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






38. MPEG; Standardizing body of audio coding






39. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks






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






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






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






43. 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






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






45. Increases or decreases the digital signal so that the loudest sample is brought up to 0dBfs; Uses all bits from dynamic range and makes it even from track to track






46. Sum of all harmonics; Sum of sine and cosine waves which have frequencies f - 2f - 3f - 4f...






47. Single- pin RCA cable or fiber- optic TOSLINK connector used for digital transfer; 75O coaxial - 2- channel unbalanced; 'Consumer' format of AES3






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






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. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc