The best replacement for soundflower is audio hijack.

The best alternatives to soundflower are rated as following:
★★★★★  audio hijack
★★★★  rewire
★  wiretap

Your alternative for soundflower is not listed? Suggest!
Speaking about soundflower, one probably shouldn't forget about audacity.

Other search terms related to soundflower and their ratings are:
★★★★★ audacity
You have in mind a companion for soundflower and it is not yet here? Propose!



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soundflower
audio hijack
rewire