Always stay inspired!

Here is a very simple step by step guide to getting a sidechain feel inside Sylenth 1 without a compressor.

1. Turn off OSC 1 [A1] by putting zero in the voices section

Voices section in Sylenth 1

2. Go to LFO > Choose 3rd lfo choice which is (ramp)

lfo ramp in Sylenth 1

3. Turn the LFO rate to 1/4

4. Bring the LFO gain all the way up

5. Choose Mix A or or AB as the LFO destination

LFO destination Sylenth

This will give you a pumping effect!
Have fun!