Nobody's really made AMK tutorials since it's so easy to use. But if you really want one, you can read AMK's readme, included with it.
Download AMK and in its ZIP, drag the AddmusicK folder somewhere to your desktop. Now, just download some music. We have a very large collection of custom music, ready to be inserted with AMK,
here. Now, if the music you downloaded was unsampled (meaning a song that does NOT use a BNK file or BRR files), drag the music TXT to the "music" folder in AddmusicK's folder. Then open up Addmusic_list.txt, and at the bottom, add your music to the list, starting at the number 29. So you'd add your music like this:
Code29 music.txt
2A music2.txt
2B music3.txt
(and so on)
Now, take your ROM (it has to be at least 1MB) and run it through AMK. Congrats, you inserted music into your hack with AMK!
Now, for sampled music you got from our music section (meaning a song that DOES use either BRRs or a BNK file), drag the TXT into the music folder as usual, but if the song uses a BNK file or BRR files, drag whatever files it uses, the BNK file or BRR files, into the "samples" folder. Then add the sampled music's TXT to Addmusic_list.txt as usual, and run your ROM in AddmusicK.
Not so hard, is it?