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. More accuracy in low amplitudes and less in higher amplitudes






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






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






4. AAC (Advanced Audio Coding); MP3; RA; WMA; OGG Vorbis; Dolby Digital/AC-3; DTS; ADPCM






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






6. A time regulator that makes all samples and bits to align when working with interconnected digital devices; Basically a signal that all of the digital devices refer to when operating.






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






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






9. 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






10. 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






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






12. Sample Rate x Bit Depth x # of Channels






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






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






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






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






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






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






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






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






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






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






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






24. Eight channel digital surround sound system by Dolby






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






26. Psychoacoustic model of data reduction used for general audio compression that aims to transmit only features perceptible to the human ear; Useful for mastering streaming media






27. Decibels Full Scale






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






29. 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






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






31. The frequency range that is allowed through a filter






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






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






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






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






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






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






38. 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'






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






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






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






42. Measure of the amplitude of a longitudinal wave






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






45. The amount of energy at each wavelength






46. 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






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






48. MPEG; Standardizing body of audio coding






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






50. Root Mean Square; Refers to taking the square root of all instantaneous amplitudes; Takes the average of those squares; (-6 Peak Level is approximately equal to -20 RMS)