NEWS.md
    coherent option for summing amplitudes. Setting coherent == TRUE means coherent phases, so amplitudes are summed using addition; setting coherent == FALSE means incoherent phases, so amplitudes are summed using the root mean square. This argument is now available in many hrep functions where spectra are constructed.[.wave method.silence function.concatenate method for waves.pad method for waves.as.data.frame.wave.wave now supports the argument phase.save_wav and play_wav, a more streamlined and faster alternative to save_wav_sox and play_wav_sox.decode_chord_quality).decode function.smooth_pi_spectrum, smooth_pc_spectrum, sparse_pc_spectrum.pc_set_norm_form to pc_set_type.