Hot on the heels of Native Instruments’ Replika give away (), Softube has offered up its popular Saturation Knob as a free plugin, previously only available via Avid or PreSonus. The Saturation Knob is a completely free (no-strings attached or sign ups), one-knob modeled output distortion, with three distortion styles, modes, Keep High, Neutral or Keep Low. It’s available as AAX, RTAS, VST2, VST and AU. This free plugin isn’t for a limited time, this baby is free for life. Softube announced the news this morning via its blog, saying; “As of today, Softube’s Saturation Knob is available as a free download. It can be used in any VST, Audio Units or AAX host—and also as a Rack Extension in Propellerheads Reason—on both Mac and Windows platforms.