Didn't they give details in the magazine?
I hate it when they do that. Actually those magazine articles usually do that. They give a hint, or a clue, then, they don't give you the details. That is a marketing trick..... used in TV and everything else..... it's called the "cliff hanger" to ensure that you come back for more, thinking you will eventually get the answer.
OK.... so using modulation and delays is something that can work in certain places. I like to use delay on guitar and vocals often in place of reverb, but sometimes with a light reverb. It's something you need to experiment with to see what works and where.
Sometimes I will add a delay and find it doesn't work, so I delete it. I work with country and jazz a lot.
The mags are good for giving you some ideas, but then it's up to you to work it out.
As with any FX... My general rule of thumb is usually: Less is more.