What does an audio interface do?
Basically an audio interface connects an audio source ( mic/guitar/DJ Mixer) to a Computer where you might be Recording or Managing sound to Speakers. An audio interface upgrades the sound output of a computer. Most computer sound cards and outputs are not intended for higher resolution output associated with music recording/production and DJ production. An audio interface prepares sound that you input into your computer. Assists you to record with a higher quality sound resolution.
Inputs and Outputs
Ask yourself? Do I need more inputs to allow for e.g. Vocal and Guitar input at once.
The mix can be input separately into a computer so editing levels independently on your recording program is possible.
Recording multiple musicians simultaneously on separate inputs.
Multiple outputs to multiple sources... for e.g.. you performing a live set whilst recording into a device, you'll need separate outputs.
Separate speaker control for master speakers and monitor speakers.
DJ's gain a separate output for headphone mixing.
If you need to input from older retro music equipment via the MIDI -output.
USB Audio Interfaces are popular, offering a very common connection which is fast.
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