Ich zitiere es mal direkt aus dem Handbuch, damit sich da nicht jeder komplett durchscrollen muß:
"What is anti-cramping?
You will have noticed the phrase 'anti-cramping' in our references to X-EQ 2 and may be wondering "what is this and why should I care?" Well let us explain...All digital audio systems have a finite frequency bandwidth dependant on the sample rate. The upper limit of this frequency bandwidth is known as the Nyquist frequency.At the most commonly used DAW session sample rates of 44.1 kHz and 48 kHz, the upper limit of the frequency bandwidth is close to audible range of the human ear (22.05kHz /24kHz). In a traditional digital EQ design, as you approach this upper limit a phenomenon called ‘cramping’ or 'wrapping' occurs, whereby bell-shaped boosts or cuts at the upper-end of the frequency spectrum (around 15 - 20 kHz) begin to suffer and become affected. The effect of EQ cramping may not always be immediately obvious but listen more carefully and you will hear distortion, ringing and other artefacts that make an EQ sound unpleasant e.g. lack of smoothness in the top end. This can be particularly frustrating when trying to get some nice 'air' out of a vocal to name one real-world example. Or perhaps, you are trying to add some overall brightness/air to the whole mix.The solution that most manufacturers use to get around this issue is to implement ‘oversampling’; the audio entering the digital processor (in this case, the plug-in) is upsampled to a higher sample rate, processing is applied without the audible cramping issue as the upper bandwidth limit has moved further away from the audible frequency range, and then downsampled back to the original sample rate. Whilst this works, it’s often at the expense of CPU usage for the user in their DAW and therefore ‘costs’ a lot more processing power.X-EQ 2 uses SSL's own proprietary 'anti-cramping' algorithms to prevent the unpleasant artefacts of EQ cramping, particularly those which cause asymmetrical response curves for bell boosts at around 15 -20kHz. Unlike standard digital anti-cramping, SSL’s proprietary solution achieves this without any additional CPU cost. How do we do this? Well, you'd have to ask our DSP experts and I think they are quite keen to keep this one a secret..."
Also kurz gesagt es hat den selben Effekt wie das bei den meisten anderen Herstellern übliche Upsampling, ist aber dabei CPU-freundlicher. Was genau da passiert, wollen sie aber nicht verraten.
