How many channels does an audio interface need?
Many musicians consider an eight-input interface to be sufficient. But this is actually the minimum number of channels needed for recording a live rock band: four mics for your drum kit plus guitar, bass, vocals and a mono keyboard.
What is a multichannel audio interface?
From Audacity Development Manual. Multi-channel recording means recording more than two separate channels of audio at once on the same computer, synchronized to each other.
What is a 2×4 interface?
Interfaces are often described in terms of their total I/O (input/output) channel count: an interface with 2 inputs and 4 outputs is “2-in/4-out” or “2×4.” Choose an interface with enough mic preamp channels for each microphone you want to record simultaneously.