The point about color images is interesting. Although they might not be able to deduce the exact wavelengths in which the image is encoded, they would very like

The point about color images is interesting. Although they might not be able to deduce the exact wavelengths in which the image is encoded, they would very likely be able to understand that the colored image layers are connected, as the layers correlate highly in their spatial structure. In the same manner that we use artificial coloring to better understand astronomical images, the color information on the disk provides more information when viewing the images, which could make the images more interesting for their study. For the spoken language, there is likely not enough information to decode its meaning. But its inclusion together with images of us might lead them to understand how we communicate by voice. The sounds of animals and humans may be similar to other lifeforms discovered. Music as well may be something which is common to many forms of intelligent life. It would probably not be possible to understand much of the contents, but observers might be able to relate to the emotions in the music (even though they may not map directly to ours). In any case, with art much of the value lies in the interpretation. As long as content is presented which they would care to judge as art, they may see value in it.