update search results after each character typed.
Update search results in real-time as characters are added to the query without the need to hit Enter or "search".
You may only need to type 2 or 3 characters to get to the song you're looking for, but if you have to submit the query, you don't know when you've input enough of the name to narrow the results sufficiently. Huge UX benefit. Make it a togglable option if too computationally expensive for some devices.