if value.get("sampling_rate") is None:
                    # At least, If you want to convert "PCM-byte" to "WAV-byte", you have to know sampling rate
                    raise KeyError("To use PCM files, please specify a 'sampling_rate' in Audio object")
                if value.get("bytes"):
                    # If we already had PCM-byte, we don`t have to make "read file, make bytes" (just use it!)
                    bytes_value = np.frombuffer(value["bytes"], dtype=np.int16).astype(np.float32) / 32767
                else:
                    bytes_value = np.memmap(value["path"], dtype="h", mode="r").astype(np.float32) / 32767