Storing sound

• What is sound made up of?

  Bits stored in files on a computer
• How does digital sound differ from analog sound?

  Digital sound is stored as bits, analog is continuous
• What device records sound as an analog signal?

  A microphone
• What are analog signals composed of?

  Pieces of continually changing data
• Why must analog signals be converted into digital data?

  So computers can read and store sound files
• What converts analog signals into digital data?

  Analog to digital converters
• What is the process of converting analog to digital called?

  Sampling
• How does digital data represent analog waveforms?

  By sampling the amplitude at regular intervals
• What happens to data during the sampling process?

  It loses some information from the analog wave
• What does the digital data curve resemble?

  The shape of the analog wave
• How can digital data quality be improved?

  By taking samples more regularly
• What is the effect of sampling rate on sound quality?

  Higher rates yield better sound quality
• What is the relationship between bit depth and sound quality?

  Higher bit depth improves sound quality
• What factors affect the size and quality of sound files?

  1. Sample rate (sampling frequency)
  2. Bit depth
  3. Duration of the sound
• What is the term for the frequency at which samples are taken?

  Sampling rate
• What does a higher sampling rate indicate?

  More samples taken per second
• What is the effect of a low sampling rate?

  It can lead to poor sound quality
• What does bit depth determine in sound files?

  The dynamic range of the audio signal
• How does bit depth affect the sound quality?

  Higher bit depth allows for more detail
• What is the relationship between bit depth and dynamic range?

  Higher bit depth increases dynamic range
• What is the significance of the blue dots on the graph?

  They represent sampled amplitudes of the wave
• What does the graph of sampled data illustrate?

  The changing amplitude of the analog wave
• What is the purpose of sampling the amplitude of a wave?

  To convert it into digital data
• What does the term "bit depth" refer to?

  The number of bits used for each sample
• How does the bit depth affect the values that can be taken?

  It limits the range of amplitude values
• What happens once the device has sampled the recording?

  It creates the curved digital representation
• What factors influence the size of sound files?

  Sampling rate, bit depth, and duration
• How does the sampling frequency relate to sound quality?

  Higher frequencies improve sound quality
• What is the effect of sampling every second?

  It may not capture all sound details
• What is the significance of the term "sampling rate"?

  It defines how often samples are taken
• How does the sampling process affect the final sound quality?

  It determines the fidelity of the sound
• What is the relationship between sampling rate and sound fidelity?

  Higher sampling rates yield better fidelity
• What does a higher bit depth allow for in sound files?

  More detailed sound representation
• How does the bit depth affect the dynamic range of sound?

  It increases the range of sound dynamics
• What is the effect of a higher sampling frequency?

  It captures more detail in sound
• What does the term "dynamic range" refer to?

  The difference between the quietest and loudest sounds
• How does the sampling process impact the representation of sound waves?

  It simplifies the continuous wave into discrete points
• What is the purpose of the blue dots on the graph?

  To indicate sampled amplitudes
• What does the graph of sampled data represent?

  The changing amplitude of the analog wave
• What does the sampling process reveal about sound waves?

  It shows how sound waves change over time