- the control toolbar is like any audio player transport buttons. Pressing the spacebar will start and stop play, and shift-spacebar will loop-play a selected section (called a region).
- To select a section, click on the selector tool and drag over the part of the audio you want to change. Move the cursor over the edges of the highlighted section to grap and extend the length. Press Z to move the selection edges to zero-crossings eliminating clicks from edits.
- For gain changes (also known as trim..it refers to the intensity of an audio signal), highlight a region (section) and use the "amplify" or "normalize" commands from the effect menu, or move the volume slider at the left of the track display. That slider sets the level for the track.
- Use the draw tool like a pencil to re-draw waveforms to eliminate eliminate clicks or other distortions.
- Click and drag over part of a track to zoom in. The magnifying-glass icons on the right hand side of the top of the track window can be used to zoom in or out in steps, to zoom to the selection, or to zoom out to see the entire project at once. A scroll wheel works as well.
- Cut, Copy and Paste work as expected. Highlight audio you don't want and press delete. Audacity will close the gap.
- Use the silence selection tool (mute) if you'd like to remove audio without making changes to the timeline.Select audio you want to keep and click trim to selection to delete everything except the selected region. The silence selection icon mutes selected audio, but without moving any other audio regions, leaving a silent space, like hitting "mute" for that time range. Any other edits will close up that gap.
- You can grab the vertical edges of a track and drag up or down to make it wider and easier to see for editing. The track can be reduced in size to see more tracks after you are finished editing
- You can always undo edits, but not after you save. Audacity saves small ".aud" files that has all the editing data, so you can do multiple save-as steps to store different versions of the project, to retain flexibility without duplicating all the large sound files. Selecting view>history will show you a list of your actions, and by clicking on the various entries, the edits will revert to that stage of the edit, you can then discard all moves after that point by clicking the discard button. The history list is cleared whenever you save and you cannot undo after a save. Audacity has been known to crash, so save often.
- You can use the Audacity plug-ins like the compressor, EQ, filters and normalizing. The Audacity "Noise Removal" effect is not the best and I don't recommend it. Audacity's effects need to be applied one at a time. To remove an effect, you have to step backward with "undo."