Audio Technology Practice Questions 1

May 17, 2010


1 You have just shot some scenes on a DV compliant video camera and now want to edit them in a software package on a computer.

Using appropriate technical terms describe the process you will go through to do this.

Identify and describe the basic principles involved at each stage of the processs; including the main hardware and software components.

2 You have just made some audio recordings with couple of Sure SM58 mics’ in a basic studio set up using a PC to record the tracks.

Describe a basic system for doing this with the given mics and using appropriate technical terms describe the process of turning the analog signal into audio data.

Include all hardware and software requirements and the basic variables involved in digitising analog audio.

3 Calculate the files sizes in mBs for the following audio recordings:-

a

  • Sample rate – 44,100 hz
  • Bit depth  – 16 bits
  • Length of recording – 3 minutes
  • Channels – 2

b

  • Sample rate – 8 Khz
  • Bit depth  – 4 bits
  • Length of recording – 94 seconds
  • Channels – 1

c

  • Sample rate – 48,000 hz
  • Bit depth  – 24 bits
  • Length of recording – 4 minutes
  • Channels – 4

4 A client has asked you to create a short audio loop based on a simple midi file composition.  Describe how you would go about this process.

5 Calculate the files sizes in Gigabytes for the following video stream data:-

a

  • Resolution – 800 x 600
  • Bit Depth – 16
  • FPS – 25
  • Length – 9 minutes

b

  • Resolution – 720 x 576
  • Bit Depth – 24
  • FPS – 30
  • Length – 20 minutes

Essay Questions

1 Using three common audio codecs and associated file endings discuss the relationship between file size and audio quality.

2 Discuss the different video compression standards that can be used for the simultaneous distribution of a video project over common platforms such as DVD, web and mobile device.   Include aspects such as file size, data transfer rates, quality and resolution.

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