(See the article by Jeffrey Barish in The Absolute Sound at. Jump ahead about five years, and we’ve seen the development of the digital streamer and network bridge for high-end audio. It turned out digital streaming wasn’t, as many had initially thought, a bit-perfect stream immune to noise, but a system where everything mattered. ![]() It was also discovered that the USB receivers in computers were “dirty,” and that USB cables, which folks had mistakenly thought were only transmitting 0s and 1s, had a significant impact on audio quality. ![]() Gordon Rankin’s development of the Streamlength code showed the benefits of asynchronous (rather than isochronous) USB with respect to improved timing and the concomitant increase in audio quality. And, for many, the convenience of having hundreds or thousands of recordings readily available from an iPhone, iPad, or tablet outweighed any downsides with respect to “ultimate” audio quality.Īs we started connecting our computers directly to USB-capable DACs, however, we discovered that USB as a communications protocol and a digital interface had ”issues.” While USB was really convenient, it often didn’t sound quite as good as other types of digital connections, e.g., a SPDIF interface via coax. While the ultimate quality of reproduction was arguably not as good as with disc players or LPs, it was good enough in most circumstances. No longer shackled by physical media and disc players to provide digital content, a lot of folks, including me, started connecting computers directly to USB-capable DACs. The advent of asynchronous USB DACs and streamers about 10 years caused a revolution in digital music reproduction. This article discusses the foundation, advantages, and components of fiber-optical LAN connections for digital streaming front ends in high-end audio systems. Copper Ethernet cables have been the traditional means for physical LAN-based connections, but recently, more audio companies and listeners are utilizing components that support fiber-optic-based connections. While Wi-Fi-based connections can work well for transmitting digital files or streaming music files from service providers, most listeners are finding fewer dropouts, more consistent connectivity, and higher audio quality is obtained by using physical LAN-based connections. ![]() ![]() All in all, main principle of choosing isolator is application, reliability and cost performance.With the advent and rise of steaming music services (e.g., Spotify, Tidal, and Qobuz) in recent years, along with the ever-increasing use of music servers in conjunction with ripped or downloaded music files in lieu of traditional physical media, more and more audiophiles have come to rely on LAN-type network connections for providing content to digital components. For example, noise relates with the accuracy, power dissipation relates with the reliability. In addition, there are many important parameters also relate to product performance, such as accuracy, power dissipation, noise, insulation strength, bus communication. Meanwhile, the input and output mode (voltage mode, current mode, loop power supply mode) of the isolator shall adapt to the interface mode at the front and back channel. The signal isolator is installed between two system channels, so the input and output functions shall be determined firstly when selecting an isolator. Signal isolator can convert 4-20mA/0-20mA signal to standard signal or other customized signal.ġ input channel & 1 output channel, 1 input channel & 2 output channels, 2 input channels & 2 output channelsġ output channel: <0.8W, 2 output channels: <1.5W
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