Knowledgebase: Audio Interfaces
Clean Up Those Digital Recordings with the Digitrack!
Posted by Rick Shao on 16 November 2015 06:47 AM

Digital recording has taken off in the last few years for their convenience and simplicity. And while its easy to setup a computer to record, it's not always easy to create high-quality recordings. Buzzing, humming, feedback and other sounds often plague such recordings. If your recordings are suffering from these problems, or they just lack the quality you hoped digital would bring, you may want to think about an inexpensive upgrade. A USB audio interface like Phonic's Digitrack can eliminate unwanted noise and improve your digital recordings.

Digital vs. analog cabling

All unbalanced analog cables (like those used to connect a mixers output to a computers sound card) can act as antennae radio frequency (RF) interference - and the longer the cable, the bigger the antenna. RF interference is the subtle distortions that make your recording sound veiled or grainy, or the high-frequency howling like that of feedback. RF interference loops also can form between a mixer and a computer, traveling along the analog cable. Even computers themselves create RF interference that can be transferred to the unbalanced analog cable and make its way onto your recordings.

Digitrack uses USB cables to transport audio signals to the computer. USB cables have a big advantage over unbalanced analog cables when it comes to avoiding RF interference. They carry digital signals, which have a much higher RF rejection threshold and therefore a much lower chance of coupling (combining) RF interference with the audio signal.

The need for intelligent digital conversion

Most mixers and tape decks produce analog signals, but computers run on digital signals. When a mixers output is connected to a computer, the sound card is forced to convert the analog signal to digital. However, most sound cards are not optimized for this type of conversion. Digitrack uses specialized analog-to-digital (A/D) and digital-to-analog (D/A) converters to handle the conversion more efficiently, and has the added feature of digital input and output via S/PDIF. This lets you keep digital signals in the digital format and avoid signal degradation that results from digital-to-analog-to-digital conversion.

You'll be surprised how much difference Digitrack can make for your digital recordings. Whether you record on tape first and later converts it to digital or record right to the computer to create sound files that can be uploaded to the Internet, Phonics Digitrack helps create clear, lively digital recordings.

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