How to Make a Melodic Techno Synth in Serum

I start in Serum with a unison of 16, and open oscillator B with a lower unison. In the filter section I take the German low pass filter to get an analog feeling, and make sure A and B both go through it.

Envelope 2 goes on the cutoff, and I add a little bit of release on envelope 1.

I add a compressor with a very low threshold so it's really snappy. Then delay on 1/4 and 1/2 in ping pong mode, and reverb with a lot of decay, a lot of size, a low cut and a high cut.

Make sure you add a bit of noise, like the AC hum. You can now FM A from B to make it a little bit more spicy, add an EQ to clean it up, and add some distortion on Stompbox or tape saturation.

Finally I add LFO 2 and make the rate go to a bar.