Redoptor is a high quality Vintage Tube Distortion emulator 
The organic sound of a tube amplifier being pushed into breakup has been the gold standard for overdriven and distorted tones for as long as musicians have been intentionally distorting their signals.

The gentle natural compression and rich blend of even and odd harmonics produced by analog tube circuitry make any effected signal feel more powerful, punchy, and alive.

Unlike solid-state transistor and fuzz circuits which only produce odd harmonics and limit the incoming signal in an unnatural and unresponsive way, Redoptor smoothly and dynamically responds to the changes in volume of incoming audio, just like a real tube amplifier. This means that louder sounds are saturated with more crunch and delicious harmonics, while softer and naturally decaying sounds clean up gradually. This creates a very sonically pleasing distortion.