Dirty Filter is one of those freebie plugins that you have to have or at least try out. BPB gives us this tube saturation and filters resonant plugin for free to crank up your sound and get dirty results with it. The interface is pretty simple and user friendly, made up of two resonant filters, a high and low pass filter and an emulated analogue tube circuitry to make it more interesting. The filters range between 20Hz and 20kHz and have a selectable filter slope build int to let you select the dB octave. These octaves come in 12, 24, 36 a 48dB.
On the left side of the plug-in interface, you will find a mix parameter knob to define how much the signal is affected by Dirty Filter. On the right side of the interface, you will find a volume knob to adjust the overall output level of the unit. Right at the centre of the plug-in unit you can find the Drive Amount selector, with this knowledge you can select the application of saturation. When this knob is positioned at zero, only filters will be active, tourn the position forward and you will start noticing some quick EQ on your audio, move it all the way forward to 100 value and the extreme tube-style saturation will kick in giving you some really creative saturation sounds
Experimenting with resonant filters and especially with cranking the drive amount selector, you will get some pretty interesting saturated results that when tamed, can get you fantastic creative results. This free plug-in is available to use on Windows and Mac users. It is available as a VST2, VST3 and AAX plug-in, making it easy to integrate it into your DAW.
Image: Bedroom Producers