Others may disagree, but I think at present Soundflower, although the core of the software survives and is occasionally updated, is practically obsolete, apart from use by highly technical users that might have a specific need for it.
Rogue Amoebas 2 products are excellent
Audio Hijack is the easiest to understand and use and can record directly in the App.
Loopback is slightly more complicated but is best for complex inter application audio routing.
But I think it is well looking at Source Elements
Source Elements Source Nexus Range is brilliant and Source Elements are a serious grown up broadcast and post production services provider with a claimed 10000 studios interconnected with it’s software.
There is a FREE version which is just an audio driver, which will appear in your Audio devices list in QLab and in any other core audio program e.g QuickTime Player, and just works. It’s multichannel too. (You need recording software that can use different input and output devices though )
The Basic and Pro versions are expensive, but add AAX plugins, so can record from virtually any program directly into ProTools. The Pro version will give you 24 tracks at 96kHz. and has 2 instances A and B
Basic and Pro are available on 15 day trials
(If you use ProTools check out the trials of Source VC and Source Talkback for iPhone monitor and talkback remotes for your studio.)
Mic