An audio interface and an amp serve different purposes in a music setup.
An audio interface is a piece of equipment that connects to a computer and provides various inputs and outputs for connecting different kinds of musical equipment, such as microphones, guitars, keyboards, and speakers. It processes and converts the analog signals from these devices into digital signals that a computer can understand, and vice versa. This process allows for recording, editing, and mixing audio.
An amp, on the other hand, is an electronic device that increases the volume of an electrical signal from a musical instrument. It is typically used to amplify the sound of an electric guitar or bass guitar, but can also be used for other instruments. The amp has a preamp section that shapes the tone and a power amplifier section that boosts the signal to drive speakers. An amp is an essential part of the signal chain for a live performance, as it outputs the sound through