Audition is a sound manipulation program that allows you to open, create or record new sound files and edit them. You can use this software to record your music, voice or other audio, edit it, mix it with other audio, add effects...
Adobe Audition provides different work areas for editing single waveforms and creating multitrack mixes. To edit single waveforms, you use Edit View. To mix multiple waveforms, you use Multitrack View.
Edit View and Multitrack View use different editing methods, and each has unique advantages. Edit View uses a destructive method, which changes audio data, permanently altering saved files. Multitrack View uses a nondestructive method, which is impermanent and instantaneous, requiring more processing power, but increasing flexibility...
This tutorial will show you the basis of working with both views.
But this will be only a short preview of all the possibilities of Audition! You can also create CD projets, work with midi, video...
Once you have integrated the basis, just try the advanced fuctions of this really powerfull software...