SE4

SE4 is a small lightweight audio plugin developed specifically for Audacity users. This particular plugin deals with expanding the input signal.
It can be deployed on all Windows versions out there, provided that you the Audacity audio player installed on the target computer. Plus, it is recommended to store the audio plugin in the same folder where Audacity is kept.
Audacity is an open-source audio editor that works with most audio formats and podcasts. It comes with support for recording and playback capabilities, multitrack mixing, voice and noise reduction, multi-channel modes, audio speed adjustments, audio spectrum analysis, and plugins. Plugins can be employed in order to enhance the functionality of your audio player.
SE4 offers you the possibility to tweak several parameters, namely balance between the RMS and peak envelope followers, attack time in milliseconds, release time in milliseconds, threshold level, and gain expansion ratio used when the signal level exceeds the threshold.
Other important audio options that you can alter allow you to change the distance from the threshold where the knee curve starts, control the gain of the output signal (useful for correcting the excessive amplitude caused by the extra dynamic range), modify the level of the input signal in decibels, as well as adjust the degree of gain expansion applied to the input signal.System requirementsAudacity