Yep, I definitely see where you're coming from with this. It was my initial take as well, but as crazy as it is, after some time spent comparing different approaches, turned out that this is the fastest way to do it in JavaScript world, and that is true even up to older browsers such as IE8 (I haven't bothered measuring anything related in browsers older than that, because IE8 is the oldest browser with some way to output generated sound), but especially true with the latest optimizations such as CrankShaft.

However, I should probably set up some public performance tests and compare the instructions these things compile to have some hard data back my claims, I wouldn't exactly trust me just saying it is so, as I have just tested these things on the fly.

But, however, this approach is more modular, and fits more use cases, and that matters even more for me right now, but trust me, I've spent my time optimizing every operation to the point that it doesn't make things harder to use. :)