This was a logo that I made and submitted for a contest for the band Brothers Moving. They are a band that have 2 acoustic guitarists one bass guitarist and one cajon player.

All four musicians are also the vocalists.

The idea for the logo was based around the recurring circular design element in both the guitars and the cajon. In the first circular element the four strings represent the four musicians. And in the second one the lines represent the vocal chords of the musicians.