As far as I'm aware, my microphone is fine in all other games.

In TF2 however it is too damned quiet! I'm at maxed out transmit volume, with mic boost on and I'm really quiet.

The odd thing is that it didn't used to be like that. Originally, if I dragged the slider up above half way it would be too loud and would glitch out.

Can anyone help me?

This your Fatal1ty mic? No idea, though make sure it's rotated the right way to your face and not below your chin.

Rename your tf2 folder, and see if a fresh version fixes it

I've had this same problem as well.
If you find a way to fix it Met, please let me know

shout into the mic and let the whole street know what ur doing ffs! simple solution.

I had this problem on my girlfriend's computer. I updated her motherboard sound drivers.

is vista generally more quiet than xp? cos i have the monitor sound of 25 and full in windows settings and it never needed to be this high on xp

It really depends. Your XP sound driver will be different from your Vista sound driver so it's difficult to say. You would expect them to be the same I guess...

Out of the box, Vista sets its volume to 66% default. I think this is the same for XP.

hmm how strange that mine is different

Any luck fixing yet Met?