We have received reports of some visitors not being able to listen to the recordings.
We believe this is a problem with your computer/browser rather than this site, but it would help us if we can collect examples. If you have problems playing any of the recordings, please test your computer/device set up by going to this test site and see whether you can play the test file. If you cannot play it, you have issues with your system which you need to resolve. You do not need to report that here.
If you can play the test recording but not one or more of the lecture recordings, please report this using the following form. We would really appreciate your help in this matter.