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






2. Process that begins with a fast FFT analysis of the spectra of two input signals - then the multiplication of like frequencies - and IFFT to finalize the process






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






4. 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.






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






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






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






8. 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






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






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






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






12. 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'






13. Very quiet digital amplifier that produces a series of output pulses with the audio signal coded the same as the width of the output pulses; Pulses are used to represent wave forms and are either on or off; Intense signals have long pulses with short






14. 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






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






16. French mathematician that noted that any complex sound can be broken down into a series of component pure tones






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






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. Decibels Full Scale






20. Signal voltage is relayed to a register from sample- and - hold circuit; Holds reference frequencies in binary form that decrease in value; Finds approximated value & assigns binary number accordingly






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






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






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






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






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






26. Based on Full Scale (dB/FS); -6dB represents a loss of one bit so account for this when calculating






27. ABR; Codecs that encode data by determining how dense or sparse areas of the audio are while also keeping bit rate within specified limits to avoid rebuffering






28. 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






29. Same as 'aliasing'






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






31. 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






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






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






34. 8- in/8- out on one cable; 25- pin D- sub connector






35. Mixing data and control characters in a single operation






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






37. Visual graph that shows how loud a sound is at different frequencies






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






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






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






41. ADAT Optcal; 8- in/8- out on two cables; Fiber- optic - TOSLINK connector






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






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






44. Method of representing an acoustic quantity with a series of binary numbers; Can have only specific individually distinct values






45. 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






46. 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






47. AES






48. Full Scale; Type of metering that measures level in digital recording system; Recording and Mixing levels should NEVER exceed 0dB FS in digital audio or clipping will occur






49. Lossless Format; Can hold up to 25GB on a single- layer disc and 50GB on a dual- layer disc






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