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. 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






2. 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






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






4. 4.38 GB; SS/SL






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






6. A digital filter's time domain output sequence when the input is a single sample is input






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






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






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






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






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






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






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






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






15. Eight channel digital surround sound system by Dolby






16. Have odd numbered harmonics






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






18. 16-Bit; 44.1 kHz; PCM; Stereo






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






20. 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






21. 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






22. MPEG; Standardizing body of audio coding






23. Digital Word -> Series of Resistors (each with assigned charges) -> Sample- and-Hold Circuit -> Anti-Imaging Filter (Smoothing Filter) -> Reconstructed Sample






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






25. 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






26. Playback; I/O Connections; CPU (Streaming); Conversion from DAW or Software






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






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






29. 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






30. Sample Rate x Bit Depth x # of Channels






31. RAM holds in memory audio data before it is transferred to the memory controller; Certain amount of data is processed before large amounts of data are streamed to prevent latency






32. 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






33. 7.95 GB; SS/DL






34. The frequency range that is allowed through a filter






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






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






37. 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






38. 8.75 GB; DS/SL






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






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






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






42. 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






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






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






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






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






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






48. 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'






49. Based on psychoacoustics - these are the basis of frequency analysis for a perceptual codec;






50. Data is transmitted over fiber optic lines; Uses a TOSLINK connecter instead of an RCA type; Can transmit multi- channel audio; Not susceptible to ground hum and loops; Able to support far higher rates of data transfer over greater distances than coa