you can combine several achievements in one, what's an lp, producer, no mistakes allowed, explore the studio space, box set and juke box.
go into the gh studio.
make 20 'songs', each with 1 note, short or long, doesn't matter. (producer)
meanwhile, hold down each of the fret buttons for tips. (explore the studio space)
then go to quickplay, make your setlist with the 20 songs you just made and save your list.
set your character to beginner and start playing the first list of 20 songs. (what's an lp + no mistakes allowed)
then change the setting to easy, play your list again, then medium and so on.
that's 100 songs, after changing from beginner until expert. (box set)
do this 3 times and you also get the last achievement juke box.