You have a customer who is a musician and wants to record and process music in his PC. What do you tell him are his options for audio interfaces for this activity? (Choose three.) A. FireWire B. Parallel C. PCIe D. USB Solution Ans- A. FireWire C. PCIe D. USB The audio interface is the hub of the modern recording studio. From humble home studios to massive media production houses, audio interfaces serve the vital function of passing audio from the outside world into your computer and back again. For many artists and engineers, the audio interface is the single most important piece of hardware, providing microphone preamplifiers, direct instrument inputs, digital converters, metering, headphone distribution, even digital signal processing (DSP), all in one unit. In more sophisticated setups, high-channel-count audio interfaces completely replace the role of traditional recording consoles. FireWire Audio Interfaces There are two types of FireWire found on audio interfaces: the older FireWire 400, which is the same speed as USB 2.0, and FireWire 800, which is almost twice as fast. For years, FireWire was the standard for high-speed audio interfaces and was found almost exclusively on Mac computers. Most modern computers connect to FireWire audio interfaces via FireWire to Thunderbolt adapters. FireWire delivers ample performance for most project studio needs, and FireWire audio interfaces have the benefit of being extremely affordable while providing high channel counts. PCIe Audio Interface PCIe audio interfaces boast specifications in line with Thunderbolt audio interfaces but require PCIe slots for installation. PCIe systems - such as Avid Pro Tools | HDX and Apogee Symphony - are typically intended for high-volume professional audio-production applications. USB Audio Interfaces While you might encounter an old USB 1.1 audio interface, USB 2.0 is the most common connection type on the market, providing moderate speed and near universal compatibility on Mac and Windows PCs. To overcome latency issues, many USB audio interfaces include \"latency-free\" monitoring options, which range from analog routing options that let you simply monitor the live input to more advanced onboard digital mixers that may even include DSP effects/processing. USB 3.0 is over 10 times faster than USB 2.0 and supports higher track counts with far less latency. Class-compliant USB audio interfaces, such as the Antelope Audio Orion 32, can provide up to 24 channels of iPad recording via the Apple Camera Connection Kit. .