Audacity is a free, open source, cross-platform audio software for multi-track recording and editing. Audacity is great for what it is, but it is important understand what it isn't. Audacity is not a DAW and it is not a sequencer. Some people will try to use audacity like a sequencer or DAW and get frustrated because of its limitations. Understand that audacity is not meant to be used that way. It is simply an audio recorder and editor. It is great to use to record sound, add effects and edit tracks by cutting, clipping and deleting, but that's it. Also understand that audacity does not play well with MIDI files. Audio and MIDI are different and audacity was intended to be used for audio. Audacity is great if you just want to use an excerpt of a longer recording. Upload the recording, clip and delete the parts that you don't want and then download the resulting file. Audacity is also great for sampling sounds. Record a sound into audacity, add some effects, delete what you don't want to use then download the file that can then be uploaded into a true DAW or sequencer.