ClipShifter is a clipping-style limiter that provides enough user controls to be useful in all mixing stages. ClipShifter uses a unique threshold control to change the clipping threshold dynamically based on the transient characteristics of the incoming audio. The sonic characteristics of the clipping distortion can be altered from hard, brickwall-style clipping, to softer saturation with compression. Additional parameters allow the user to control the even- and odd-order components of the saturation.

Oversampling
A problem with many audio plugins is aliasing artifacts. This occurs with certain algorithms that apply non-linear processing to the audio signal. It is especially prevalent at lower sampling rates (e.g., 44100 or 48000). The result is that additional audio content is present at unintended frequencies. This can sound like undesired distortion or harmonic ringing. In general, ClipShifter minimizes aliasing effects through the use of its internal clipping algorithm; however, certain situations can produce unintended audio artifacts.

Oversampling is a process that greatly minimizes alias effects. The general process is to increase the samplerate internally, process the audio, filter out all of the alias artifacts, and then down convert the samplerate. This occurs internally and the audio host application is not aware that any samplerate conversion is occurring.

ClipShifter has settings for 2x, 4x, and 8x oversampling. This means that audio is internally being processed at the samplerate of the track, times the multiple (e.g. 4x of a 44100 sample is up-converted to 176400 samples per second). The result is that most of the aliasing artifacts do not occur once the samples are filtered and returned to the original samplerate before passing to the host application.

Since oversampling involves processing 2, 4, or 8 times the amount of data as well as additional filtering, oversampling can tax the computer’s CPU. Depending on the computer, this may appear as a CPU usage of 2 to 4 times the amount when compared with oversampling disabled.

Clicking the oversample button cycles through the various options (i.e. Off, 2x, 4x, 8x).

Please note: Oversampling involves filtering high frequency content of the audio. Depending on the frequency content of the source and the settings of the multiband frequency control, audible difference can exist between the different settings. This can sound like a slight decrease in the very top end of the audible spectrum (i.e., -3dB above 17kHz).

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http://lvcaudio.com/plugins/clipshifter/

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