My settings haven't changed. I do have a physical deformity which explains the low volume.

Thanks to all for the replies.

Thanks for the reply. I amended my profile accordingly. Also, you are right on about sleeping position. I sleep on my back, and these events do not normally wake me up.

From Sleepy Head:

My apologies for being so obtuse. What I meant was that my ASV was no longer working for me in my situation. The machine itself seems like it's functioning properly. My masks seem to not have too many leaks. But I am vexed at why my therapy that was working so well, all of a sudden began giving me p...

Hi, I started BiPAP about 3 years ago, and moved to ASV (VPAP) in March, 2014. I have a Resmed S9 with humidifer, Quattro Mirage FFM, and up until the beginning of June it was all working great, with AHI less than 1.0. Then it just stopped, and my AHI started going into the 8-15 range. The last 3 ni...