Thank you to Ralf Mardorf for recommending vokoscreen and to Neil C. Smith and William Light for recommending simplescreenrecorder to use as a desktop or window video-and-audio-capture program. For this first attempt, I used vokoscreen (which worked very well, thank you, Ralf), and for my next attempt I'll try simplescreenrecorder (after I watch some of the videos produced by Neil Smith :-) I dug up a composition from some years ago that I still had the tracks for, in order to open them in Harrison's Mixbus 32C (which I hadn't heard about until a few weeks ago here on the linux-audio-users list) and begin to learn to mix audio, which has always seemed daunting to me. I decided to try to make a YouTube video of the finished session (I am not nearly confident enough yet to try to make a step-by-step real-time video of a mixing session). If anyone cares to see the result and/or make any comments (I would appreciate any help at all, and hopefully others can benefit from the comments as well), it's here-- https://youtu.be/RorzyytX6OU Thank you, everyone, especially Paul Davis for Ardour, Harrison Consoles for using Ardour to create such a wonderful program that seems to work perfectly and reliably on Linux, and the many helpful and inspiring people on the linux-audio-users list including Glen MacArthur and Dave Phillips. Steve Doonan