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. 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






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






3. 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)






4. 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'






5. 'Reconstructing' part of digital audio






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






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






8. Also known as equal loudness curves; Graph that indicates the average ear sensitivity to different frequencies at different SPL levels (as volume increases - these curves flatten out)






9. Data reduction technique that does not effect quality of original audio; No effect on original quality; Typically around 50% reduction; Exact reconstruction of digital code for the audio signal






10. 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






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






12. 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






13. Eight channel digital surround sound system by Dolby






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






15. Sample Rate x Bit Depth x # of Channels






16. More aggressive lossy data reduction techniques that require further manipulation of the stereo field; Examples are 'Intensity' & 'M-S'






17. Waveform of a pure tone showing simple harmonic motion






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






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






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






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






22. Measure of the amplitude of a longitudinal wave






23. 12cm plastic disc; 1.2mm thick; One- sided; Red Laser; 1.6 microns between tracks; 125 nanometer pits






24. 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






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






26. 12.33 GB; DS/ML






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






28. 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






29. Measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form); There must be a minimum of 2 samples for each cycle in a waveform






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






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






32. Digital (binary) measurements of how long each pulse is either on or off; Width of increasing voltage or decreasing voltage is assigned a 1 or 0 respectively






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






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






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






36. Leaving space at beginning and ending of song for data crunching during mastering; Last step in mastering process






37. 16-Bit; 44.1 kHz; PCM; Stereo






38. Pertaining to hearing or sound; Combination of the intensity of air pressure molecules with amplitude






39. Overtones that contribute to the timbre of a sound and make up a complex waveform's physical characteristics






40. Voltage -> Dither -> Anti-Aliasing (Low Pass Filter) -> Sample & Hold Circuit -> Successive Approximation/Quantizer --) 100111010 (PCM Audio File)






41. 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






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






43. Fractional part of a floating- point number; Also called the mantissa; Defines precision






44. 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






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






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






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






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






49. The process of reducing the space required to store data by efficiently encoding the content.






50. A network communications protocol that specifies how machines will exchange data; Uses a broadcast system in which one machine transmits its message on the communication medium and the other machines listen for messages directed to them







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests