![]() And as we shall see, even a D/A converter that powers its USButler from within isn’t immune.ĪudioQuest’s approach to tackling the noise that travels along USB’s power and data buses is to passively filter it. A direct electrical connection between the two is mostly unavoidable. ![]() The majority of USB receiver chips rely on the host computer’s 5V line for power. Getting more device specific: direct-connect said PC or Mac to your DAC via USB cable and that noise can work its way into the converter where it messes with the timing of sensitive (sample rate) clocks which in turn piles on the jitter. When deployed at the top of a digital audio playback chain, EMI and RFI can prove subtly troublesome to downstream connected devices. The result? A wide (frequency) spectrum of noise. ![]() Inside your average Apple or Dell, numerous high-frequency fundamentals ring out before harmonics bring in the chorus. The message is a simple one: a consumer-grade PC or Mac’s circuits aren’t designed with electrical noise minimisation in mind. ![]()
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