hello gooroo,
your philosophy is probably right and easy to understand. anyway, just to clarify a little bit (and, be sure :-) no more than 1 time), i'll say that, though i'm using audio software for vlf radiowaves research since 1993, words such as "regions" or "bookmarks" are unknown to me, at the moment, in this field.
moreover just say how different any of us experience may be especially regarding what *you* have to do, i am using the mac since 1997 with soundedit, macthescope, amadeus II and pro, spectrafoo, signalscope pro and some more. still searching for something new and (hopefully) better, even to be proposed to other friends and collegues in our worldwide association (The Inspire Project) and journal, for the mac area, of course.
so far i have to say that the best suited for the vlf purpose is probably "spectrumlab" a freeware from a german ham, for win pc only.
maybe spectrumlab lacks a lot of very important features for the music or other audio fields but, as i said before, it depends on what *you* need to do. i do not see any vlf related software in the mac community, so i have to look for in different roads in order to realize the products who better fit with our needs.
anyway, since i'm not an english language guy, i may have misunderstood your meaning. i'm sorry about that.
i'd like take this opportunity to suggest (if i may) to the wavepad people to better clarify the difference between the 2 edition in the wavepad web pages directly. from my perspective potentially buyers will find that explanation useful.
have a nice day.