PSP NobleQ combines the features of passive program equalizers with a wide range of frequency settings and extended functionality. To make this plug-in a versatile tool, PSP added several modern features such as an adjustable high pass filter, and the ability to switch the high peak and shelf filters to "Boost" or "Attenuation" modes.

PSP NobleQ stands out for its warm sound, its boost and attenuation low-shelf filters, and its combined peak and shelf high frequency processing. The warm and musical sound in PSP NobleQ is made possible thanks to its finest processing utilizing FAT double sampling for natural, analog-like response. We also added an output valve-like rounding algorithm with adjustable processing depth.

The low shelf filter actually combines two shelving sections: the first one allows you to boost low frequencies while the other one attenuates them, but is tuned slightly higher. Together, they help to get a rich bottom end without low-midrange muddiness.

The high frequency range consists of two filters – a peaking filter with adjustable bandwidth (usually set to Boost) and a shelf filter (usually set to Attenuate). Both filters interact in such a way that the more attenuation to high frequency is applied, the more the selective peaking filter becomes while keeping its center frequency similarly boosted.

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