To denoise a signal, one keeps a portion of the signal's coefficients in the selected basis, and reconstructs from these coefficients. Xwpl has an algorithm to predict where to make this cut. This is displayed graphically in the coefficient plot (showing the sorted amplitudes of the coefficients). By selecting another portion of the coefficients, the user can do a different kind of denoising.
The reconstructed signal can be saved into a file by clicking on the Save button. Only the current reconstructed window is saved.