3/25/2023 0 Comments Studio word clock![]() ![]() Bob Bauman, co-founder and chief hardware engineer for Lynx, elaborates: “Crystal oscillators are spec’d for drift over temperature and time. The rate at which these crystals vibrate is quite precise, although not exactly the same from one crystal to another. The crystals do double-duty to also produce sampling frequencies that are multiples of 44.1 and 48 kHz. Crystal-based clocks that operate at various sampling frequencies need a separate crystal oscillator for each base frequency: 44.1 kHz and 48 kHz. The Lynx Hilo converter is shown here.įor example, converters made by Lynx Studio Technology include crystals that oscillate at 11.2896 MHz, which rate is then divided by 256 to achieve the nominal sampling rate of 44.1 kHz. Interestingly, this frequency is way higher than what is ultimately desired for use in digital audio a multiplier divides it to yield one of the nominal sampling frequencies used in production.Īll current Lynx converters use a hybrid PLL circuit called SynchroLock, together with an analog PLL, to reduce jitter in external clock signals. At the factory that supplies pro-audio manufacturers with these crystals, the size and shape of each is tweaked to make it oscillate at a very specific frequency. The clock typically uses a crystal that physically vibrates when excited by an electric current. In order to transduce and transmit audio properly, a digital audio device uses an internal clock that regulates the rate of flow-the sampling frequency-of digital 1s and 0s in its bitstream. Our journey begins with a look at the heart of most digital clocks: the humble crystal. We’ll examine why rock-solid clocking is so crucial to producing high-quality sound and how manufacturers incorporate innovative designs to improve the quality and reliability of their clocks. We’ll discuss what these devices do and how they (sometimes) differ. This month, Mix looks at the linchpins for synchronizing digital-audio systems for music production: master clocks and clock-distribution boxes. Multiple pieces of interconnected digital gear must operate in perfect synchrony to produce great results. In digital audio systems, it’s what makes audio sound pristine instead of like garbage. As in most things in life, timing is critical to success. Good timing is the difference between salad and compost. 1: The block diagram for a traditional phase-locked loop circuit, or PLL. ![]()
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