I don't have a strong opinion on this one. I just noticed that the status of these questions is very unclear and confusing, and it's time to take a specific direction.
We are starting to get more visits and more questions. It's becoming clear that we'll get an important amount of id questions, so we need to be very clear about what will be allowed and what will not.
For now in the close reasons, in the off-topic section, we have:
Questions about the identification of songs, tracks, and artist are off-topic (...)
And in the topics page, in the "don't ask about" section we have:
Identification of bands, artist, songs, etc.
It's clear that id of bands, artists, and songs is off-topic, but the status of other id questions is addressed only by the "etc" in the "don't ask about" section of the topics page.
By seeing the examples above it seems that they are on-topic (no close votes, positive vote count, and so on). But from the "etc" in the topics page, it's implied that they are not, the "etc" implies that id questions in general, no matter the subject or context, are off-topic. (perhaps that "etc" needs to go, and put something more explicit in its place)
Also, according to this meta discussion, instrument and sample id questions are on-topic. The status of these questions in general is kind of a mess.
So, regarding identification questions, what are we allowing? What are we not allowing? Will all identification questions be off-topic? Will some identification questions be on-topic?