Logic Pro X is a very unique music production application. The modern form of composing with loops adds a mass production feel to any project someone can do. This can be frustrating in a field where traditionally perfection and expression are taught as the most important factors in performance. Using n eight bar long loop that will never change removes a lot of the control from an operator.
The hardest part of any loop based project is finding a number of loops that can harmonically fit together while simultaneously fitting the theme of whatever piece is being performed. However, the amount of dynamic control along with tempo can help blend multiple contrasting loops together. For example, in my curious effect song I bring in a funk brass loop at 0:34 into a brooding, fully synthesized atmosphere. The use of dynamics allowed me to blend these two contrasting styles together.
Something I believed would actually be an issue was the key of the loops. If I picked the key of C I assumed only C loops would work but I found places to throw in other keys as well. Again, in the Curious effect piece the very low bass part is actually keyed in D as a way to disorient the listener as if to represent the idea of the unknown. This was intentional as it goes with the science theme of the podcast it was written for. This being said, key is highly depended on the environment it is introduced in but can typically be checked by the composers ear very quickly.
In Conclusion, loops are a lot of fun when a composer wants quick results. However, I personally would rather spend months composing a single piece than a few hours just so that every aspect of my discipline could pour onto my sheet music. Loops are too easy to be regularly used in a classical training method.
