Read any interview with professional engineers and producers and there will no doubt be mention of their favored equipment, whether it be synthesizers, outboard equipment or more often than not these days, favored plugin effects. Dig a little deeper and you might get an insight into some of the tricks of the trade, and among those who wax lyrical about the wonders of reverb, we would wager that there are just as many who will effervesce about their favorite delay.
DAWs are packed with them, or you can get them from classic gear like tape recorders. Step outside and shout in the right location and they