sound design ... how do I make a synth 'flutter'?

[KeyitDay]

I hear it on a lot of future pop/future bass songs where there is a synth lead which has different timed flutters in and out, some really fast at the beginning then get slower in the moment

An example of a simpler flutter is on the synth in the chorus of : Blue, a song by Deep Chills, Trove on Spotify

 

[rhythmgj]

I can't listen to your sample right now, but by your description I assume you mean using LFO ("low frequency oscillator").

Look into it!

Practical Tips for Using LFOs

The beginner's guide to using an LFO | MusicRadar

How to Use LFOs Creatively for a Better Mix | LANDR Blog

GJ

 

[E.T.F]

In ableton, "flutter" can be produced a numbers of ways- Using frequency shifter as a vibrato, auto pan with varying width and LFO rates, overdrive and chorus, volume or clip automation, sidechaining...its possible to translate these techniquess to any DAW or vst. And understanding synth parameters helps- the LFO in sylenth is easy to assign for example.
pm me if u want any more ideas......

 

[LyonLotus]

In that song specifically It's just a saw with a lowpass filter modulated by an LFO. You can then modulate the LFO rate to control the speed of the ''flutter''. Look for tutorials on 'wobble chords' or 'future bass chords' for whatever synth you're using and you'll probably figure it out

 

[OuterSpaces]

LFO's are your friend