ALIEN SYNTH  

For my alien sounds synth, I decided to use the FM Synth section of the Retro Synth. To get the 'fluttering'-like sound, I applied a peak filter which was modulated by a triangle LFO. I also applied some vibrato to the synth. I made this sound a higher pitch by raising the "Harmonic" and "Inharmonic" sldiers to 1.