What are some alternatives?
When comparing SoX and Adobe Audition, you can also consider the following products
Amadeus Pro - #
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
DarkWave Studio - DarkWave Studio is a free, open source, Digital Audio Workstation for Windows.
Ardour - Record, edit, and mix on Linux, Mac OS X, and Windows.
Free Audio Editor - Free Audio Editor is a sound editor program for Windows.
GarageBand - GarageBand is a fully equipped music creation studio for Mac