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. Number or variable that represents the number of times the base of a power is used as a factor; Defines magnitude






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






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






4. Electromagnetic receptor that detects the radiation known as visible light






5. Governs the frequency response of a digital system; The highest- frequency component that can be captured with a sampling rate; always 1/2 of sampling rate; Also called the limiting frequency






6. In order to play multiple channels at one time data is buffered as read to disk; Latency happens between play command & beginning of playback






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






8. Roughly around 1 -130 ft/s






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






10. EBU






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






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






13. Have odd numbered harmonics






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






15. Decibels Full Scale






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






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






18. 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






19. Take up half as many bits (50%); Algorithm can keep same quality by lossing the stereo track






20. The difference in volume between the loudest and quietest sounds of a source






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






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






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






24. 16-Bit; 44.1 kHz; PCM; Stereo






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






26. HD Audio format; Lossless Compression; 24- bit/96 kHz; 5.1 Surround or 24- bit / 192 kHz stereo sound






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






28. Ultra low- latency - 512- channel (on a gigabit network) - less flexible AoE format; Routed like audio cables...not network cables






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






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






31. Mixing data and control characters in a single operation






32. Describes acceptable data - performances both offered and essential for a disc player - and the complete user experience






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






34. Multi-Bit Words; (Pulse Code Modulation)






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






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






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






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






39. The amount of energy at each wavelength






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






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






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






43. Anytime bit depth is reduced the gap gets bigger so more dithering is required






44. The loudest point of a Full Scale system






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






46. Reduces the percieved distortion due to quantization error; Low level white noise source is introduced to make the profile of the quantization 'noise' more irregular; Useful when reducing the number of bits per word in a signal (i.e. when converting






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






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






49. Measure of the amplitude of a longitudinal wave






50. 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