audio files

• What do we learn about in this material?

  How computers store audio properties
• What is the term for the height of sound waves?

  Amplitude
• What changes analog sound into numerical data?

  Analog to digital converter
• What does the sampling process involve?

  Taking periodic samples of the analog signal
• What is the first step in storing sound digitally?

  Recording analog sound by a microphone
• What is the term for measuring amplitude at regular intervals?

  Sampling
• What is the process of rounding values to whole numbers called?

  Quantization
• How are values stored in digital audio?

  As binary numbers
• What affects the quality and file size of audio recordings?

  Frequency of samples and precision
• What is the sample rate measured in?

  Hertz
• What is a typical sample rate for music recordings?

  44,100 Hertz
• What does each sample represent in audio recording?

  The wave's height as a number
• What is the term for the number of bits used to record a sample?

  Bit depth
• What bit depths are typically used for recorded audio?

  16, 24, or 32 bits
• How does a two-bit depth affect audio recording?

  It results in significant departure from original
• What advantage does a four-bit depth provide?

  More accurate recording with less rounding
• What is the trade-off of larger bit depth?

  Larger file size due to increased data
• What are the different audio file formats mentioned?

  • MP3: lossy compressed, small size, lower quality
  • AAC: Apple-specific, similar to MP3
  • Vorbis: lossy compressed, better quality than MP3
  • WAV: uncompressed, high quality, large size
  • FLAC: lossless compressed, retains quality, smaller than WAV
• What is the purpose of MP3 format?

  Popular for streaming and storing music
• What is the AAC format used for?

  Apple-specific audio storage
• What is Vorbis format known for?

  Being open source and cost-effective
• What is WAV format used for?

  High quality audio for CDs and production
• What is FLAC format ideal for?

  Sharing high-res audio online
• What is a limitation of FLAC compared to MP3?

  Less compression than MP3 or Vorbis
• Why is compatibility a concern with audio formats?

  Limited compatibility with devices and players
• What are the key factors in digital audio storage?

  • Sampling rate impacts audio quality and file size
  • Bit depth affects precision and range of numbers
  • Different formats serve various purposes
  • Balancing quality, compatibility, and storage efficiency is essential