I finally broke down and got this app, as I figure I will be needing it in a little while. It’s quite an extensive app, much more than the RTA I was expecting. It has A- and C- Weighting (as well as none) for the RTA, as well as peaks and average SPL displays and noise curve overlays. I think that’s quite cool and could be useful.
Also a simple SPL meter which comes in handy. There is an add-on for a SPL history graph. Out of all of the addons, I think that one would be most useful. Alas, it’s $10. Which, if you stop and think about it, is not expensive at all for pro audio analysis equipment. Still more than I would like to spend at the moment.
There’s also an audio oscilloscope which I don’t think is going to be as necessary for PA work as it is for music gear analysis…
Lots of audio calculators are included, I have no need for them at the moment but I like to have them available.