Jitter is just a single number distillation of a phase noise measurement. The best solution is to create the lowest jitter clock as close to the DAC as possible. A clock sent over an ultra-high quality cable will still increase its jitter considerably. It might still be an accurate clock, but accuracy is of little performance benefit to digital audio. Even if a small amount of noise couples into the clocks, jitter will increase dramatically. Each time it’s buffered or transmitted, a portion of its precision is lost. Why are external clocks sub-optimal for digital audio?Ī clock signal is a fast moving precision electrical signal and is extremely sensitive to added noise or distortion. Digital audio clocks need to be low jitter first and foremost. Using ultra-precision communication clocks is not a great solution for audio playback. However, if a song plays back slightly fast or slow due to the inaccuracy of a clock, it won’t be noticed. If a clock is jittery, each part of a signal is being placed at the wrong time relative to the others, so the sound will be distorted in an unnatural way. Audio playback needs super low jitter but not super strict accuracy. "Clock accuracy is a measure of how close the average second of a clock is to the theoretically perfect second. However, then I read what MSB says about clocks: The C18 is almost the price of the DAC, though. That's a HUGE difference and should be audible. Now, I just checked out the Gustard C18 clock, and it is stated that it's -110dB. I had no knowledge regarding whether -70dBc at 1Hz deviation from carrier was a good or bad figure.
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