New to disc brakes; been riding a new bike for about 7 months (with a lay-up over last winter) that has 'em.

The brakes are Hayes CX Expert with semi-metallic pads. All riding so far has been on-road and without load. (Touring bike.) Back brake works fine, but front has taken to squealing when I apply pressure quickly. Doesn't if I feather in. Also the rotor sometimes "jingles" or "dings" on release, especially if I'm turning at the time. Still seems to brake just fine; just loud.

The pads aren't rubbing, and I've thoroughly cleaned both braking surfaces of the rotor with alcohol. Might have lowered the volume of squealing, but hasn't stopped it. Checked all the mounting bolts; everything's tight.

I've Googled and YouTubed this problem but haven't found anything exactly like it yet.

Haven't stripped or adjusted anything, pending forum input; since I'm new to the technology, I'd rather know what I'm looking for before I start scattering parts.

Thanks in advance.