I have been using the QA401 and its software for almost a year now, and I have a few suggestions regarding the test plugins that I think will improve them.
The first thing that has bugged me since I first started using the QA401 is the lack of certain options in the test plugin menus, in particular the frequency response tests. The lack of the ability to enable averaging comes up while I am performing a response sweep on a tape recorder, where there are always small deviations occurring because of the physical nature of the media. Being able to apply a 10 average makes for a cleaner graph to provide my clients.
The second item that I think needs to be implemented is the ability to change the vertical axis in the test plugin menu for the tests that use dBV as the scale. Many pieces of gear these days use dBm (0dB=775mV). Having to adjust the external gain setting and changing the axis name manually seems more like a workaround and not a solution.
I think, overall, that the majority of issues I have are with the lack of consistency between the main screen options and the test plugin options. The inability to properly title and add notes to the main screen printout is limiting, especially when I would like to use averaging and other items available in the main screen menu.
This is not to say that I do not like the QA401 experience thus far, but I do think that these are some improvements that I think will make the experience even better. Huge shoutout to Matt and the whole QA team for the regular blog/forum posts and software updates