Zero Padding in the Time Domain

Unlike time-domain interpolation [270], ideal
spectral interpolation is very easy to implement in practice by means of
*zero padding* in the time domain.
That is,

Since the frequency axis (the unit circle in the plane) is finite in length, ideal interpolation can be implemented

- Practical Zero Padding
- Zero-Padding to the Next Higher Power of 2
- Zero-Padding for Interpolating Spectral Displays
- Zero-Padding for Interpolating Spectral Peaks

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Center for Computer Research in Music and Acoustics (CCRMA), Stanford University