i made a basic gain utility and learned JUCE! it taught me C++, object based programming and xcode, so mess around with it and if you have questions or want to flame me on my dsp, go ahead :D.

the underlying zip contains a mac application (standalone), a .component file (audiounit) and a vst3 (plugin). I HAVE NOT MADE AN INSTALLER so you do need just a little comfortablity when it comes to moving them to the right spots on your machine.