Limiter:
It is loosely modeled after the Fairchild 670, a feedback-based tube compressor/ limiter with a soft knee, with slightly different attack and release envelopes due to a differing feedback topology. An IRC I limiter is then applied after the tube processing to transparently prevent clipping.
Compressor:
Think of the Vintage Compressor as an accurate analog emulation of a compressor that has never existed before! We’ve combined some of the best elements of vintage analog compressors to create this algorithm.
EQ, btw:
The Vintage EQ module is based on the Pultec EQP-1A and Pultec MEQ-5, two highly regarded equalizers from the 1950s. EQP-1A affects the high and low frequencies, and MEQ-5 acts on the midrange. The Ozone Vintage EQ closely emulates the frequency response of the Pultec EQP-1A and MEQ-5 by modeling their individual circuit components.
Kurz und deutsch:
Limited ist angelehnt an einen Fairchild, aber eigentlich auch wieder nicht - eben ein soft nee Limiter der etwas nach Röhre klingen soll mit einem normalen Limiter danach. Der Kompressor ist völlig frei erfunden, zusammengebastelt aus den Sachen die die Leute von Izotope an Vintage Equipment für gut befunden haben. Der Vintage EQ hingegen ist eine Pulteq-Simulation.