Input dimensions of audios shorter than 4 seconds on URBAN SOUND DATASET

[NEGU93]

I am personally working with URBAN SOUND DATASET and found your paper. In load_urban_sound before rows_audio = [np.vstack(rows_audio)] get the error:

ValueError: all the input array dimensions for the concatenation axis must match exactly, but along dimension 1, the array at index 0 has size 88200 and the array at index 67 has size 176400

Indeed, some has sized 88200 and others have 176400.