
The audio interface is selected for specific needs, so the number of inputs/outputs must match the number of connected equipment. To record only a voice or a voice + a musical instrument, a sound card with 2 inputs-outputs is sufficient in a home studio.

internal – looks like an expansion card, connects to the PCI-E slot on the motherboard.The characteristics are determined depending on the equipment already available and the needs of the studio. When buying an audio interface, you should pay attention to: Creative Audigy Rx Which sound card should I buy?.3 Best PCI Sound Card For Music Production.
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Creative Sound BlasterX G6 – gaming audio card.RME Fireface UCX – Professional Sound Card.11 Best USB Sound Card For Music Production.Best PCI & USB Sound Card For Music Production.Differences between sound card for games and card for music.
