Santiago Barreda
Assistant Professor, Department of Linguistics, UC Davis

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resample [phonTools]

 

Resample a signal using sinc interpolation. the interpolation can be made as precise (or not) as desired. In the example below, a signal has been downsampled and then sampled back to its original rate. The three versions of the signal are compared.

 

 

Code used to generate examples:


data (sound) # downsample and then upsample the sound back to # its original sampling frequency downsamped = resample (sound, 11025) upsamped = resample (downsamped, 22050) # compare a part of the waveforms for all three sounds par (mfrow = c(3,1), mar = c(4,4,1,1)) plot (sound$sound[1:14000], type = 'l') plot (upsamped$sound[1:14000], type = 'l', col = 2) plot (downsamped$sound[1:7000], type = 'l', col = 4)