How to set the "duration" parameter for a flanger with LFO oscillator
The LFO rate is the speed of the delay modulation. One full cycle is going from &quot;down&quot; to up&quot; back to &quot;down&quot; again. It's in Hz, i.e. &quot;per second&quot;. Let's says the music is 120 bpm and your LFO rate is 0.5Hz. 120 pbm is 2 beats per second or 4 beats per flanger cycle.
Beats Per Cycle = Music_speed/60/flanger_rate