Signal Chain

Signal chain is the path that the signal takes from your instrument to speaker (where it's heard by an audience) or sound board (where it's mixed with the signals from other instruments before being amplified to an audience). Your signal chain can become long and complex as you add in multiple effects and preamps but the the basis of any signal chain for a musician using a PA is:

1/4" In from instrument > DI box > XLR Out to soundboard