Thanks for the image file. I've stopped adding more and more features and stuff recently, and I'm going back trying to fix up all the little things that I never get around to doing. So improving that splash will be one if them.
yeah that recording is rough isn't it. It is not a straight out Mac issue, because it works nicely on my Mac mini. I'm sure it is hardware related. But I am just not confident enough to point the finger at any one thing. But I would not be surprised if a USB mic on the same Mac would give better quality. Actually come to think of it, I use a blue yeti USB mic on my Mac mini.
You might try toggling the echo suppression and loop back fields on the recorder settings tab. There is also a hardware acceleration check on the flash settings dialog when you right click the recorder. Do any of those improve things?
If I could reproduce the problem myself I wouldn't have to guess. Sorry.