What are some alternatives?
When comparing AudioDirector and Reaper, you can also consider the following products
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
LMMS - Make music with a free, cross-platform tool
Zynewave Podium - Podium is a modern digital audio workstation (DAW) for Windows.
AudioDope - Audiodope is an audio editor.
Ardour - Record, edit, and mix on Linux, Mac OS X, and Windows.
Nero WaveEditor - Download free software trials or find free updates for your Nero software from Nero 12 over Nero 11 to Nero Burning ROM, Nero BackItUp or past products