Roger Nichols Digital do a really good free one called Inspector.... its for pc though, dunno if you can get it for mac
there is another range of plugins.... Elemental Audio.... they are exactly the same plugins as Roger Nichols but for mac i believe(?)... maybe they have the free freq analyzer for mac??
look good mate, will download it when get home. Just to ask, can you run it as a plug in on a specific channel or is it just a program that opens and it will pick up the audio from my sequencer?
dont use inspector, its not what it says in the tin
its got loads of other features that just make it confusing, whats more, the screen on it is tiny. useless if your trying to iron out bugs. i use "QSpectrum" its an amazing analyser .
large screen and lots of customisability.