Representing sound

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Question 1
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An audio engineer modifies a digital audio file by halving its sampling rate from 96 kHz96\text{ kHz}96 kHz to 48 kHz48\text{ kHz}48 kHz and reducing its sample resolution from 24 bits24\text{ bits}24 bits to 16 bits16\text{ bits}16 bits.

Which of the following correctly describes the physical and digital effects of this modification?

The maximum representable audio frequency decreases from 48 kHz48\text{ kHz}48 kHz to 24 kHz24\text{ kHz}24 kHz, and the number of discrete amplitude levels is reduced by a factor of 256256256.

The maximum representable audio frequency decreases from 96 kHz96\text{ kHz}96 kHz to 48 kHz48\text{ kHz}48 kHz, and the number of discrete amplitude levels is reduced by a factor of 256256256.

The maximum representable audio frequency decreases from 48 kHz48\text{ kHz}48 kHz to 24 kHz24\text{ kHz}24 kHz, and the number of discrete amplitude levels is reduced by a factor of 888.

The maximum representable audio frequency decreases from 96 kHz96\text{ kHz}96 kHz to 48 kHz48\text{ kHz}48 kHz, and the number of discrete amplitude levels is reduced by a factor of 1.51.51.5.

Representing sound Questions

  1. GCSE
  2. /Computer Science
  3. /Representing sound