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Making Waves

• Sound representations
  • Digital audio:
    • Sampled waveform
    • Converted to analog signal which is delivered to speakers.
    • Typical sample rates (max frequency = 1/2 sampling rate):
      • 8 KHz: Speech
      • 32 KHz: VR sound effects
      • 44.1 KHz: CD
      • 48 Hz, 96 Hz: Professional
    • Precise (at expense of convenience).
    • High data rate.
  • MIDI: Musical Instrument Digital Interface
    • Note "events": on, off, pitch-bend, etc.
    • Sound quality determined by instrument.
    • Imprecise (limited control over timbre).
    • Low data rate.

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