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. 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






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






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






4. Accuracy with which an electronic system reproduces the sound or image of its input signal






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






6. Twice as many samples as the highest frequency at minimum; Sampling rate totally controls frequency response






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






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






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






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






11. Decibels Full Scale






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






13. 1st commercially successful AoE format for the transmission of digital audio - video - and control signals over 64- channel 100Mbps Ethernet networks






14. 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






15. 16-Bit; 44.1 kHz; PCM; Stereo






16. 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






17. Number of bits used to represent the smallest unit of information in an audio file; Greater bit depth = better quality audio






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






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






20. Digital and analog processing capability is combined on a single microchip allowing for 1- bit resolution at high sample rates






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






22. Data reduction technique that selectively removes original information in order to significantly reduce the file size; Some data is lost; Files can be reduced up to 99% in size (90% with no perceived sound quality loss); Bit rate effects the perceive






23. Unit of measurement that is equal to one billionth of a meter






24. Measure of the amplitude of a longitudinal wave






25. 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






26. A frequency specified for a filter (digital or electronic) the marks the point at which the frequency content of a signal is altered +/- 3dB






27. Have odd numbered harmonics






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






29. 12.33 GB; DS/ML






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






31. 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






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






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






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






35. Mixing data and control characters in a single operation






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






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






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






39. 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






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






41. Low Pressure; Part in a longitudinal wave where the particles are spread apart






42. Process of building a complex tone by starting with the fundamental frequency and adding pure tone harmonics






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






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






45. 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






46. If a signal is sampled at a rate higher than twice the highest significant signal frequency and at evenly spaced intervals - then the samples contain all the information of the original signal






47. Sample Rate x Bit Depth x # of Channels






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






49. MPEG; Standardizing body of audio coding






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