![]() ![]() Many dacs can be powered by the connected computer, but some also have a dedicated power input. Jitter causes distortion and packet errors that, in the worst case, may be audible as chopped up sound, like a tonearm jumping on the vinyl record. The image lacks body and appears somewhat flat. switching power supplies, other fluctuating electrical/magnetic fields from computer circuitry) can contribute to EMI that might pollute the USB data.ĪC noise is typically audible as added brightness to the music, glare that rides on the sound. If the data line is not effectively shielded, nearby electrical components (e.g. Running both lines through a single USB cable can cause additional interference and exacerbate the issue (so it is best to separate the two). Three kinds of noise exist, “Electromagentic Interference” (EMI), “Radio-Frequency Interference” (RFI), and switching noise which is usually high frequency (500Khz -> 2Ghz). They may contribute considerable pollution on the signal path and may increase jitter and packet errors. Noise in computer’s VBUS and data line causes sound deterioration. Goal is to preserve the signal (and therefore sound quality) along the lines. ![]() So what is behind the JitterBug idea? It is noise filtering. At the time, I ran the original Schiit Fulla with my MacBook Air – the JitterBug lowered the noise floor and improved the sonic image. I purchased the original JitterBug upon its release in 2016 together with the DragonFly Black 1.5. This name choice has caused a lot of discussions in the past. JitterBug designer Gordon Rankin was a consultant to AudioQuest and did not name the device. Unfortunately, the JitterBug FMJ (and its predecessor JitterBug) does NOT reclock (and therefore not remove jitter) as it is a merely passive device that does not draw electric current (it does not remove bugs either). Solution is that the DAC reclocks the incoming USB signal.to eliminate these time delays. ![]() In USB-Audio, “ jitter” refers to time delays in the signal that causes packet errors, which degrade sound quality. Do you know which class of insects the jitterbug belongs to? No? Well, none at all as the jitterbug is a generic term to describe swing dancing, as featured in the 1939 movie “ The Wizard of Oz“. ![]()
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