Thanks for your answer, but i think you dont understand what i want( It doesnt metter when this code execute. I can link this part with Begin Play, but there is no changes - the sound keeps unchanged. Source Effect Chain is a special type of asset, which can apply to Sound Cue, etc. I dont have several sounds, i have only one, and want to modify it with Source Effect Chain, which contains several Source Effects Presets. Before play i remove Source Effect Chain from my Sound Cue, on Begin Play after some delay i set it, but as i said before nothing changes. I want to note, that i use New Sound Engine. Source Effect Chain and Source Effects Presets exist only with New Sound Engine.