Merge branch 'fix_preamble_noise' into 'main'

        pre_trim = limits[0]

        post_trim = limits[1]

    if pre_trim <= 0:

    if pre_trim < 0:

        if pad_noise:

            # pad with uniformly distributed noise between -4 and 4

            np.random.seed(SEED_PADDING)

            noise = np.random.randint(

                low=-4, high=5, size=(np.abs(pre_trim), np.shape(x)[1])

            ).astype("float")

            x = np.concatenate((x, noise), axis=0)

            x = np.concatenate((noise, x), axis=0)

        else:

            x = np.pad(x, [[np.abs(pre_trim), 0], [0, 0]])

    else:

    elif pre_trim > 0:

        x = x[pre_trim:, :]

    if post_trim <= 0:

    if post_trim < 0:

        if pad_noise:

            # pad with uniformly distributed noise between -4 and 4

            np.random.seed(SEED_PADDING)

            noise = np.random.randint(

                low=-4, high=5, size=(np.abs(post_trim), np.shape(x)[1])

            ).astype("float")

            x = np.concatenate((noise, x), axis=0)

            x = np.concatenate((x, noise), axis=0)

        else:

            x = np.pad(x, [[0, np.abs(post_trim)], [0, 0]])

    else:

    elif post_trim > 0:

        x = x[:-post_trim, :]

    return x