Learn Compression & Dynamics Processing: The Complete Guide! In this video tutorial I’m going to be using some effects along with some Sidechain Compression, which in my opinion is a great technique that works excellent in dance and pop music, I call it the trailing delay! For this effect we will be sending the lead vocal to a delay, then applying sidechain compression to the delay. This will let the delayed vocal come back up in volume after the original part ends. This is a very cool way to add some dynamics into your delay effects.