Specifications

excellent perceived dynamic range, extending the nominal dynamic range of the media while
keeping the noise at very low perceived level thanks to its psychoacoustically-optimized noise
shaping.
PSP Xenon’s requantizer uses triangular PDF (Probability Density Function) noise generation
with the amplitude allowing for full dithering. Triangular PDF has been chosen so as to entirely
eliminate noise amplitude modulation, which is audible when noise with rectangular or gaussi-
an PDF is applied.
To make the noise much less audible its spectrum can be shaped by the process known as
noise-shaping. This process exploits the fact that the human hearing is not equally sensitive
within the whole audible frequency range. PSP Xenon has three different noise spectrum
curves to choose from. These curves follow the izophonic curves of human hearing system (for
low signal levels) to greater or lesser extent, the 'type C' representing the most faithful izo-
phonic shaping. Such psychoacoustically optimal noise-shaping coefficients have been calcu-
lated for each sample rate (44.1, 48, 88.2, 96, 176.4, 192) using multi-dimensional optimization
algorithms. The choice of the noise-shaping curve should depend on the frequency content
and general character of the processed audio.
If we sound proud of this plug-in, it’s because we are! We’re musicians, producers and engin-
eers ourselves, and we just love using this plug-in—and we’re sure you will too!
PSP Xenon Operation Manual
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