Make no mistake, your processor is underpowered for what you are doing.
Well that's news to me.

I've got dozens of apps that I run and none has complained yet.
If you are saying that BIAB is complaining when it tries to run the triplets you'll have to prove it to me.
That is, take my song, run it on your faster computer, and make a recording of the triplets as they SHOULD sound.

When I hear it played like triplets, smoothly I'll believe it!