U2 Key Features
Asynchronous USB Audio Streaming
With the Anedio U2 USB-to-SPDIF Converter, there is no longer any reason to be concerned about jitter from the USB interface. Rather than being helplessly driven by the computer, the U2 Converter controls its own timing (the asynchronous mode) using low-jitter crystal oscillators and transforms the SPDIF output into a pristine, uncontaminated stream of data.
Low-Jitter Fixed-Frequency Oscillators
In digital audio, the sample rates are available in two fundamental frequencies, 44.1 KHz and 48 KHz, and their integer multiples. Since these frequencies are unrelated to each other, attempting to generate one from the other would degrade the quality of the derived clock. Instead, we use two independent low-jitter crystal oscillators to keep the jitter consistently low at all sample rates, from 44.1 KHz to 192 KHz.
XMOS Real-Time Processor
The control center of the U2 is the XMOS real-time, event-driven processor, optimized for timing-critical applications where fast response times to events are crucial. The XMOS processor ensures the fine control of timing required for asynchronous streaming and real-time execution for freedom from glitches, clicks, and pops.
The USB ground originates from a very noisy environment inside a computer and is highly contaminated with multiple sources of switching noise. If you are using a notebook computer as your source, the noise issue is especially acute. We've made sure that none of the USB ground noise gets into the audio system by galvanically isolating it using a high-speed transformer at the SPDIF output.