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Audio Interfaces

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  1. Presonus Audiobox USB 96 Audio Interface
    Your Price $69.99
    Excellent Condition
    Cedar Hill, TX
  2. Focusrite 2019 Scarlett 2i2 Gen 3 Audio Interface
    Your Price $114.99
    Excellent Condition
    Fredericksburg, VA
  3. Universal Audio Apollo 16 MKII Audio Interface
    Your Price $1,779.99
    Excellent Condition
    Queens, NY
  4. Universal Audio Apollo Twin Duo MKII Audio Interface
    Your Price $669.99
    Excellent Condition
    Queens, NY
  5. Focusrite Scarlett 18i20 Gen 2 Audio Interface
    Your Price $334.99
    Excellent Condition
    Springfield, NJ
  6. Focusrite Scarlett 6i6 Gen 2 Audio Interface
    Your Price $164.99
    Excellent Condition
    San Jose, CA
  7. Universal Audio Apollo Twin Solo MKII Audio Interface
    Your Price $549.99
    Excellent Condition
    Memphis, TN
  8. Universal Audio Apollo UAD QUAD 2 FIREWIRE Audio Interface
    Your Price $1,449.99
    Excellent Condition
    Erie, PA
  9. Universal Audio Apollo Arrow Audio Interface
    Your Price $374.99
    Excellent Condition
    Fresno, CA
  10. Apogee Duet 2 USB Audio Interface
    Your Price $329.99
    Excellent Condition
    Dayton, OH
  11. Focusrite Scarlett 6i6 Audio Interface
    Your Price $164.99
    Excellent Condition
    Grand Rapids, MI
  12. Focusrite Scarlett 6i6 Gen 2 Audio Interface
    Your Price $159.99
    Excellent Condition
    Southfield, MI
  13. Apogee Duet 2 Audio Interface
    Your Price $339.99
    Excellent Condition
    West L.A., CA
  14. Focusrite Scarlett 2i4 Gen 2 Audio Interface
    Your Price $139.99
    Excellent Condition
    Northridge, CA
  15. Universal Audio Apollo Twin X Duo 3  Audio Interface
    Your Price $724.99
    Excellent Condition
    Florence, KY
  16. Focusrite Scarlett 8i6 Gen 3 Audio Interface
    Your Price $239.99
    Excellent Condition
    Fayetteville, GA
  17. Focusrite Scarlett 18i20 Gen 3 Audio Interface
    Your Price $394.99
    Excellent Condition
    Ft Collins, CO
  18. Focusrite Scarlett Solo Gen 3 Audio Interface
    Your Price $89.99
    Excellent Condition
    Springfield, NJ
  19. Focusrite Scarlett 2i4 Gen 2 Audio Interface
    Your Price $139.99
    Excellent Condition
    Greenville, SC
  20. Native Instruments Komplete Audio 6 Audio Interface
    Your Price $149.99
    Excellent Condition
    South San Jose, CA
  21. Novation AUDIOHUB 2X4 Audio Interface
    Your Price $89.99
    Excellent Condition
    South San Jose, CA
  22. Focusrite Scarlett 6i6 Gen 2 Audio Interface
    Your Price $164.99
    Excellent Condition
    Ocean, NJ
  23. Universal Audio Apollo Twin Solo MKII Audio Interface
    Your Price $554.99
    Excellent Condition
    Hollywood, CA
  24. Focusrite Scarlett 2i2 Gen 3 Audio Interface
    Your Price $114.99
    Excellent Condition
    Monterey Park, CA
  25. Focusrite Scarlett Solo Gen 3 Audio Interface
    Your Price $89.99
    Excellent Condition
    Warwick, RI
  26. Focusrite Scarlett 18i20 Gen 2 Audio Interface
    Your Price $334.99
    Excellent Condition
    Denver, CO
  27. IK Multimedia AXE IO Audio Interface
    Your Price $229.99
    Excellent Condition
    Florence, KY
  28. Apogee Ensemble FireWire Audio Interface
    Your Price $339.99
    Excellent Condition
    Danvers, MA
  29. MOTU 896MK3 Audio Interface
    Your Price $449.99
    Excellent Condition
    Ocean, NJ
  30. Universal Audio Apollo 8 With Quad Processing Audio Interface
    Your Price $1,499.99
    Excellent Condition
    Gwinnett, GA
Showing 1-30 of 716 
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When you come right down to it, an audio interface is anything that lets you get audio signals in and out of your computer. The challenge in picking one is that there are so many ways of getting it done, and it will all depend on how you like to work and what you're trying to do. A very basic interface would be simply a box that converted analog audio to digital audio that the recording software in your computer can understand, and convert it back to analog audio when you want to hear it. Such converters are referred to as AD/DA (analog to digital/digital to analog) converters. Better quality converters have what's called "jitter correction" to compensate for small timing variations.

Most interfaces are far more than just converter boxes. They include mic preamps, multiple I/O (Input/Output) connections—balanced, unbalanced and digital—and even internal DSP (Digital Signal Processing) for effects, EQ and basic monitor or sub-mixing user. Some units can even act as a simple, stand-alone mixer without a computer attached for use as a basic live sound mixer.

One of the biggest determinants of overall audio quality in an audio interface is the quality of opamps (operational amplifiers) used in construction. Better systems will use lower-noise, lower-distortion components, or in some cases, discrete components rather than single-chip solutions. The number of I/O connections can be a deciding factor. The basic interfaces will be 2-in/2-out, able to handle a vocal and instrument together or a stereo pair of mics for capturing a live event. From there, you can expand as far as you need, depending on what you want to invest in your system. Interfaces with 18 inputs and 22 outputs are not uncommon and will handle most users needs, but you can go far larger with a full-blown Pro Tools HD rig, if that's what is required.

The final consideration is connectivity. There are multiple ways of connecting an audio interface to your computer—USB, FireWire, a PCI slot for desktop systems or Apple's Thunderbolt connection on newer Macintosh computers—all of which have different strengths and weaknesses. USB interfaces tend to be smaller, with most mobile interfaces using USB connections, but can be less robust when you need a lot of simultaneous ins and outs. FireWire, also called IEEE 1394, is fast and robust, but generally requires an external power supply. PCI cards are the fastest with the most bandwidth, but are tied to tower and desktop systems, so will be confined to a single studio location. Some of the more popular brands for interfaces are Akai, Apogee, Avid, Focusrite, M-Audio, MOTU, Presonus, Roland, Tascam and Yamaha, though there are many others. The best interface is the one you're going to use, so spend some time with the Pro Audio specialists at Guitar Center so they can help you find exactly the right one.

In addition to the mainstream audio interfaces described above, our GC Pro team of experts offers hands-on sales and support for professional solutions such as Avid HDX Systems and the Focusrite Rednet series. These solutions are typically used in recording studios, post facilities and other professional settings.

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