The best replacement for adobe audition is pro tools.

The best alternatives to adobe audition are rated as following:
★★★★★  pro tools
★★★★  audacity
★★★  soundbooth
★★★  cubase
★★  sound forge
★★  cool edit pro
★★  logic pro x
★  sonar
★  mixcraft
★  wavelab
★  logic pro
★  cakewalk sonar
★  adobe soundbooth
★  soundtrack pro
★  fruity loops
  studio one
  acid pro
  sound booth
  ableton live
  fl studio
  sony sound forge
  cakewalk
  protools
  cool edit
  sony acid
  garage band

Your alternative for adobe audition is not listed? Suggest!
Speaking about adobe audition, one probably shouldn't forget about autotune.

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



Google Trends

Scale is based on the average worldwide traffic of adobe audition in all years. Click on graph for more.
adobe audition
pro tools
audacity