add ssnr printouts to return string

            reason += f" > {mld_lim}"

    if get_ssnr:

        reason += "\n"

        for i, s in enumerate(cmp_result["SSNR"], start=1):

            print(f"Channel {i} SSNR: {s}")

            msg = f"Channel {i} SSNR: {s}"

            reason += msg + "\n"

            print(msg)

    return output_differs, reason