LFO mode with envelope not working to make a cyberpunk synthwave

I’m trying to make a cyberpunk synthwave with Vital but I can’t get the note to play repeatedly very quickly (if that makes sense). This is the tutorial I’ve been trying to use is this = https://youtu.be/AuLIOabPCfY?t=148 (the part I’m having trouble with is the sound he plays at 2:28)

I’ve tried changing the LFO modes to all the available options (trigger, sync, envelope, etc.) but it still won’t work. Any help is greatly appreciated!

He’s most likely playing that with an external midi keyboard, or within the DAW