Shit! I got a bug on imgur, therefore I can upload only a few of all my screenshots ;(
Hopefully I'll upload the rest tomorrow or day after that.

(in this lvl only one lantern is normally lit, but I forgot about that when making screens and did it after lightning 'em up)

Kainam's Journal (2/?)

20th of December 1835

I've just realised that the strange black haired man, who moved into the mansion on the hills in November, has visited library every day for a week now. He keeps looking for something, and it doesn't look as he wants anyone's help.
Regardless, I'll talk to him the next time he comes to the Academy.

7th of December 1835

I talked to the man. His name is Aiden. He seemed very calm, and you could see the persistence in his green eyes.
I asked him if he had wanted some help, and in reply he asked if there are any parts of the library restricted from ordinary visitors.
I told him about two Departments that aren't public. Then Aiden wanted to know if there's a way to get access to that place - I told him
that the only way is to have a research confirmed by the Academy in writing. He looked a little... upset.

After that conversation he started checking closed doors. I don't know what is he up to, but I will try to secretly observe his doings.

It depends on a lot of things - source, laws, content and duration to name a few. Here's a few guidelines.

Source - Quite simply, if the music or sounds you are using come from another media source, such as a movie, music artist, music composer, video game or company use, then it is illegal unless used with permission or by abiding by any/all copyrights or trademarks which are set out. Most soundtracks or music which are created for the purpose of using, if you search for it online, are likely to fall under an "if used, credit" promotion, or would follow a License under the Creative Commons. In the case of an "if used, credit", you may use the music, however you need to give or provide credits to the user who created it in a meaningful place of use (readme's, game credits, opening credits, etc). If under Creative Commons, you require to abide by the license they have placed on their product(s), which the link above will help you with. Scrolling down the page somewhat will give you a list of their licenses and what you are required of as a user in reflection of the creator's work.

Laws - There are various laws in country's which have different ways of addressing copyright infringement, however most of them are the same with different writing.

Content - While music is considered illegal to use - generally the sounds within it could be copyrighted, however is often unnecessary as the whole track itself is usually protected. It highly depends on whether a company outsourced multiple tracks or loops to reproduce or create music, which will in turn become their intellectual property.

Duration - Using snippets of a track to the point where the song is unrecognisable is arguably okay, however becomes like garbage. Imagine listening to the subtle first three seconds of the X Files Theme (but I would recognise this) over and over.

You also cannot use paid music and redistribute it in a commercial product (something a consumer must pay for) unless you have permissions by the author.

In the pure basics however, just do not steal something and claim it is yours. That is unethical in many factors, illegal in some countries.

There are a lot of factors, just make sure that whatever you use, you're following copyrights. If you need help recognising the use of something, feel free to PM myself and I'll take a look for you, if the copyright on something seems unclear.