The best replacement for audiobus is inter app audio.

The best alternatives to audiobus are rated as following:
★★★★★  inter app audio
★★★  iaa
★★  interapp

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

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



Google Trends

Scale is based on the average worldwide traffic of audiobus in all years. Click on graph for more.
audiobus
inter app audio
iaa