Play: Plays the current media file.

Pause: Temporarily stops playing the media file. To resume playing the file, click Pause again.

Stop: Ends the playing of the media file.

Seek to Start: Advances to the beginning of the currently loaded audio data.

Seek to End: Advances to the end of the currently loaded audio data.

Amplify: Increases or decreases the volume.

Fade In/Out: Causes the sound to become louder
(Fade Out) or softer (Fade In) for transitioning into or from an audio file. This command allows you to set values on the Fade Settings dialog box to achieve a fade out or fade in effect.

To fade in, enter a final amplification greater than that of the initial amplification.
To fade out, enter a lesser value for the final amplification.

Entering the same values for the initial and final amplifications results in constant amplification. To leave the signal unchanged, enter an amplification value of 100%.

Chorus: Makes a vocal recording track sound as if it was performed by two or more people singing in chorus. This is achieved by adding a single delayed signal (echo) to the original input. Click here for more information.

Compressor: Reduces the dynamic range of an audio signal to decrease overall loudness. Click here for more information.

Distortion: Clips off the high levels of the selected audio data.

Echo: Produces a delay effect on the primary sound, thus giving the illusion of an echo.

Flanger: Produces a special effect when you mix a signal with a delayed time-varied copy of itself. This generates a typical whooshing sound, much like the elongated sounds produced by jazz musicians or an airplane flying overhead. Click here for more information.

Gargle: Changes the amplitude of the audio signal by modifying the sound's hertz and wave shape. It creates an effect similar to that of someone gargling.

Pitch: Adjusts the pitch or key of a given audio selection, without affecting its tempo or playback rate. Therefore, the sound duration is not altered.

Resample: Lets you resample a section of the currently loaded data.

Reverb: Simulates acoustic space and consists of both early reflections and echoes that are so closely spaced that they are perceived as a single decaying sound. Click here for more information.

Reverse: Reverses the selected area or entire file. This saves and plays the selected area or entire file backwards.

Silence: Replaces the selected area with silence.

Tempo: Applies a tempo change to audio selection. Changing tempo will cause the sound to play at faster or slower speed than original without affecting the sound pitch. Therefore, voices won't be altered. The duration of the audio will change accordingly with the tempo adjustment. Negative values result in an audio “stretch” (the audio will be slower), while positive values result in an audio “shrink” (the audio will be faster).

Filters:

Low Pass: Reduces the amplitude of audio signals with frequencies higher than the cutoff frequency, while maintaining the lower frequency signals.
High Pass: Reduces the amplitude of audio signals with frequencies lower than the cutoff frequency, while maintaining the higher frequencies.
Band Pass: Removes audio data with frequencies outside of the specified range, while maintaining the remaining audio data.
Band Stop: (Also called band-rejection, band elimination, or band limit filter) Passes most frequencies unaltered, but attenuates those in a specific range to very low levels. It is the opposite of the band-pass filter.