I've the A1000 & no shrill noise.
How did you rip the video? There is no problem with h.264 in mkv container for my 2 files; the audio was mistakenly set to be ac3/ffmeg; will do a pass-thru from now on. Used handbrake to do the ripping.
Haven't had time to do the videos since I'm still in the process of putting the audio CDs to the hard drive.