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. 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.






2. As sample rate is increased more room is created for a smoother slope of the attenuation band because Nyquist limit extends well beyond range of hearing with each increase






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






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






5. 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






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






7. CobraNet; EtherSound; Dante; AVB (currently under development)






8. The frequency range that is allowed through a filter






9. 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'






10. 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






11. EBU






12. Increases D/A sample rate from nominal rate to oversampling rate by turning series multi- bit PCM samples into 1- bit samples; (ex. => 44.1kHz sample rate converted to 2.8MHz and simultaneously converts multi- bit samples to 1- bit); Low Pass Filter






13. 4.38 GB; SS/SL






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






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






16. 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






17. VBR; Most common & best data reduction technique; Codecs that encode data by determining how dense or sparse areas of the audio are; Can result in buffering issues






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






19. Specific set of instructions for carrying out a data reduction technique that determines how to 'save' binary data information efficiently






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






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






22. Snippets of time in which frequency analysis takes place in a perceptual codec






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






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






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






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






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






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






29. 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






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






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






32. Measure of the amplitude of a longitudinal wave






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






34. Have odd numbered harmonics






35. 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






36. Samples are duplicated and the playback sampling rate correspondingly increased; Significantly raises the Nyquist limit to a range well beyond human hearing; Processing 'pushes' the distortion resulting from quantization error into these higher frequ






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






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






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






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






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






42. The ability of a digital system to perform complex DSP without running into problems with overflow or loss of resolution






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






44. Signal that uses variable voltage to create continuous waves resulting in an inexact transmission






45. 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






46. 15.9 GB; DS/DL






47. Splits the input signal and mixes it with an analog copy so that no latency is present






48. The loudest point of a Full Scale system






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






50. Cable used to transmit data; Inner cable is surrounded by a plastic insulator - which is surrounded by a wire mesh conductor that insulates the internal signal wire from external interference and an outer casing that functions as a ground