small fix in 16kHz lp filtering

from ivas_processing_scripts.audiotools.audiofile import write

from ivas_processing_scripts.audiotools.wrappers.filter import resample_itu

from ivas_processing_scripts.utils import progressbar_update, spinner

from ivas_processing_scripts.audiotools.audioarray import trim

def lp16k(in_file, out_file):

            f"Unsupported sampling rate {x.fs//1000} kHz for input file {in_file} - only 48 kHz is supported!"

        )

    # save length of audio since resampling can alter the length by one sample due to rounding

    len_signal = len(x.audio)

    # resample ITU only returns the audio array

    # but uses the sampling rate stored in the audio object

    # so we need to correctly set it after each call

    x.audio = resample_itu(x, 96000)

    x.fs = 96000

    x.audio = resample_itu(x, 32000)

    x.fs = 32000

    x.audio = resample_itu(x, 96000)

    x.fs = 96000

    x.audio = resample_itu(x, 48000)

    x.fs = 48000

    if len_signal != len(x.audio):

        # padding should usually not happen since the resampling only rounds up

        x.audio = trim(x.audio, x.fs, (0, len(x.audio)-len_signal), samples=True, pad_noise=True)

    write(out_file, x.audio, x.fs)