Well-timed long delays (echoes) are an excellent way to fill in part of a song’s rhythm track. Examples of echo effects can be heard in current electronic music, classic rock, reggae, and many other genres. Where would U2 be without the sound of The Edge’s delay pedals? Where would Steel Pulse be without their delayed snare hits?
The reason echo effects work so well is their ability to stay in-time (locked to the tempo of the song) and their ability to create interesting rhythms that add dimension to the overall sound of a song.
When creating delay effects with long echoes, you can define specifically when echoes are heard in rhythm with the entire song. For instance, you can set echoes to repeat every quarter note or every eighth note. Or, you can get more complicated and create a unique rhythmic pattern by placing the echoes on multiple subdivisions within the groove of the song.