A data processing method, based on double integral calculations, to obtain decoupled highresolution NMR spectra in the weak scalar coupling approximation is described. Data are recorded from conventional spin echo experiments using di β erent values of the delay of the echo. The collected echoes are processed in the time domain in such a way that resonances appear as single lines at their chemical shift frequencies in the resulting spectrum. The method described is a two-step post-acquisition treatment. In the Γrst step, broadband decoupling of the spectrum is achieved. The second processing step suppresses the modulation of the amplitude by the scalar coupling J. Finally the spectrum obtained may be presented in the pure absorption mode without J-modulation. This technique, designed by analytical decoupling, improves the signal-to-noise ratio and facilitates the interpretation of complicated spectra. Intensities are not modulated by scalar coupling and they can be employed for quantitative analysis. The method was applied to proton NMR spectra of diethyl ether and 6-vinyl-1, 3-dioxane 1,3. It may be also applied to heteronuclear spin systems and an example of a broadband decoupled carbon-13 NMR spectrum of a mixture of diethyl ether and ethanol is given.