Just a simple, but very useful chain for sidechaining purposes or simply if you need a post envelope for your instrument.
It simply triggers the envelope every time you play a note in the respective track. All you need to do is to insert the target parameter in the hydra and customize the envelope like you want. Adjust the LFO frequency to change speed of the envelope.
I didn't invent this technique, i just thought it should be in here especially for those new to Renoise.