None of the other codes is appropriate. Whether the production of sound is an integral part of a computer file. The file is not intended to produce sound. The file either includes digitally encoded sound or is intended to produce sound. The presence or absence of sound or the ability to produce sound is not known.
Bit depth is determined by the number of bits used to define each pixel representing the image.
001-999 Exact bit depth. The computer file contains no images. The bit depth level of the images contained in the computer file is not known. The number of file formats used. The format of the files is not known.