12 sound layering tips and tricks

In your quest for richer, more 'pro-sounding' tracks, it's likely you've stumbled across the concept of layering sounds. Fundamentally, this is a basic principle combine or stack two or more of the same kind of sound together to achieve a more powerful or interesting outcome than one single source can achieve in isolation, creating the perception of one fuller, denser sound. The idea is pretty much as old as music itself - imagine choirs combining multiple singers in unison to create more depth and power, providing a more complicated, interesting sound for the listener. The caveat is that it's easy to make a mess when blending several sound sources together, especially when they have similar characteristics.

https://www.musicradar.com/tuition/tech/12-sound-layering-tips-and-tricks-589568