https://vocaroo.com/i/s0NkzrUX7UrB
Uploaded to vocaroo but it downgraded the quality. It sounds a lot higher pitch in real life (2 or so octaves) but now that I listen to the recording as it was recorded on my phone, it does sound like mechanical. This happened while braking but it also happened less frequently while pushing in the clutch. Same high pitch noise. I'll ignore it and lube up the pedals when winter comes.
Now I just need to figure out the brake fluid issue. Is there any way to pull out the master cylinder without unhooking the hardlines? If I have to unhook the hardlines, might as well just replace the master and booster since I'm already 80% of the way there. Checked my caliper bleeder valves, no leak that I can feel. Need to check the pistons to see if there are any leaks around the seals and lines but too hot right now to do it. Brakes still feel fine. Pumped the brakes with the car off and it bled off the pressure as it should and the pedal fell to the ground when I started the car. Can't feel the pedal dropping slowly while pressed either. The only issue I have with the brake is the amount I need to push to stop. In the morning I need to press it about even with the gas pedal (I have pedal spacer) for it to brake then after a couple of miles of normal driving brakings, I have to push a little bit further probably half an inch or so below the gas pedal for the same amount of braking. Probably just pads heating up. Currently on Winmax W2 with 1 track day on it.
I topped off the fluid right at the full line and will see how many miles before it goes halfway to get a better idea of how fast it is falling.