Frequency Processor
The equalizer included in Turbo Play is a featured Graphic+Parametric EQ tool.

Animation Editor
Graphic Equalizer

Animation Editor
Parametric Equalizer

Based on the nice DSPFilters and SNDFilter and IIR1 and my own work, Turbo Play provides you a full set of scientific filters: All filters are configurable in lowpass/highpass/bandpass/bandstop and there are configurations for Q, ripple, rolloff, and order for the filters that support these parameters.