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Audio Effects:
Amplify Increase - Increase volume on selected part of audio file
Amplify Decrease - Decreases volume on selected part of audio file
Fade In - Creates a fading in (soft to loud) effect in the selected part of an audio file.
Fade Out - Creates a fading out (loud to soft) effect in the selected part of an audio file
Normalize - Normalization allows you to achieve the greatest amount of amplification that will not result in clipping (distortion). All parts of the wave are amplified at equal levels.
Chorus - Just as a chorus is a group of singers, the chorus effect can make a single instrument sound like there are actually several instruments being played. It adds some thickness to the sound, and is often described as lush or rich.

Delay - Delay can be used to create single echoes, as well as a number of other effects. Delays of 35 milliseconds or more will be perceived as discrete echoes, while those falling within the 15-34 millisecond range can be used to create a simple chorus or flanging effect.

Invert - This effect flips the audio samples upside-down. This normally does not affect the sound of the audio at all. It is occasionally useful, for example when the left and right channels of a song both contain equal amounts of vocals, but unequal amounts of background instruments. By inverting one of the channels and not the other, the vocals will cancel each other out, leaving just the instrumentals. Obviously this only works if the exact same vocal signal is present in both of the channels to begin with.

Reverb - Reverberates selected part of an audio file.
Reverse - Select this command to have the current selection play backwards by reversing the order of its samples. Reverse is useful for creating special effects. This effect reverses the selected audio; after the effect the end of the audio will be heard first and the beginning last. Some people reverse small portions of audio to make inappropriate language unintelligible, while others believe you can hear subliminal messages if you listen to speech backwards. You can also create interesting sound effects by recording natural events and reversing the audio.

Flanger - Applies Flanging effect to the selected part of an audio file.
Expander - Adds expander effect to the audio data array.
Compressor - Reduces the dynamic range of a signal.

Phaser - The name "Phaser" comes from "Phase Shifter", because it works by combining phase-shifted signals with the original signal. The movement of the phase-shifted signals is controlled using a Low Frequency Oscillator (LFO).

Trim - Adds trim effect to the selected part of an audio file.
Silence - Inserts a silence on selected part of audiofile
Vibrato - Makes a Vibrato effect in the selected part of an audio file.
Pitch Shift - Changes the frequency of the selected part of an audio file.
Resample - Decreases or increases the rate of the selected part of an audio file.
Stretch Time - Makes a Stretch effect in the selected part of an audio file, changing the pitch and duration.
Insert silence - Insert silence in selected part of audio file
Add Noise - Insert noise at the current selection

Mix from file - Mixes the selected part of an audio file with another file.