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Pytanie 1 z 8

During pitch shifting, which property should change while duration remains stable?

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  1. During pitch shifting, which property should change while duration remains stable?
    • Change duration while preserving pitch
    • Change loudness while preserving both
    • Change perceived pitch while preserving duration
    • Convert stereo audio to mono
  2. During time stretching, which property should change while pitch remains stable?
    • Change pitch while preserving duration
    • Change duration while preserving pitch
    • Remove all transients
    • Change only the sample-rate metadata
  3. What happens when playback rate is changed directly without compensation?
    • Only pitch changes
    • Only duration changes
    • Neither changes
    • Duration and pitch both change
  4. Which representation does a conventional phase-vocoder implementation modify?
    • Short-time Fourier transform domain
    • A text-token sequence from a speech recognizer
    • A pitch-class histogram with all phase discarded
    • An unframed average power spectrum with no time information
  5. Which signal can expose transient smearing in a phase vocoder?
    • A long steady sinusoid without a transient onset in the evaluated region
    • A slowly varying sustained tone
    • Percussive audio with sharp attacks
    • A stationary segment whose amplitude and frequency remain constant
  6. What does PSOLA rely on for voiced speech processing?
    • An arbitrary frame grid unrelated to voicing
    • Pitch-synchronous marks or periods
    • Only the transcript's word boundaries
    • Only the average spectrum of the whole recording
  7. During ordinary sample-rate conversion, what happens when the output sample rate is correctly updated to represent the same signal?
    • Pitch necessarily rises at every new sample rate
    • Duration always halves during any rate conversion
    • Pitch must change even when the output represents the same time span
    • Pitch and duration are preserved rather than intentionally shifted
  8. How should an audio augmentation transformation be chosen?
    • Keep changes plausible and preserve the task label
    • Use the largest possible stretch
    • Apply it to test data until results improve
    • Choose a method without listening