[lisyarus]

That's for efficiency reasons: most streams have way more logic than just filling the array, which can hardly be represented in terms of "getting the next value", and loops are good for optimization by compiler, etc. In fact, the actual sine wave implementation looks exactly the way you describe: it handles a generating function to a helper class that just fills the array https://bitbucket.org/lisyarus/psemek/src/master/libs/audio/...