jplay推出发烧usb扩展卡
JCAT USB card created together with Adnaco Technology, the company with expertise in design of low noise high dynamic range (120dB+) data acquisition systems for sonar and radar applications, was made specifically for low noise high performance audio applications like hi-end audio playback.
Specification:
- ultra low noise design for noise sensitive audio applications
- ultra low noise linear regulators and high quality filters
- high precision ultra low phase noise oscillator
- uDP720201 NEC controller
- two USB 3.0 connectors supporting Low Speed (1.5 Mbps), Full-Speed (12 Mbps), Hi-Speed (480 Mbps) and Super-Speed (5 Gbps) data rates
- 5V for USB devices can be supplied from a PC’s power supply via an HDD LP4 connector or from an external power supply via a power jack connector
- for noise sensitive applications the 5V USB power can be filtered by two onboard high performance filters with PSRR better than 90dB at 10kHz
- in case external PSU is of very high quality, it is possible to bypass the filters and pass 5V USB voltage from the external PSU directly to the USB connector
- for self-powered USB devices a 5V power is not required for the card operation
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就是sotm差不多的hifi扩展卡啦，虽然sotm做的骚，但是毕竟是新出的东西，sotm好像只有usb 2.0的产品。不过jplay这个卡不便宜，jplay老用户预订价都要折合2400人民币，这个有点hi。。。。。。
这做工2400，抢钱吧！ hifi处处都是坑 淘宝有一款带屏蔽盒的，一样芯片，貌似振晶也差不多才60RMB。这个真坑 {:3_90:}
有必要吗，USB先天不足？ 主板上USB确实先天有不足，上了扩展卡之后，ASIO延迟开到4ms，HQplayer缓冲开到5ms，随便怎么折腾，一点毛病都挑不出。 还在低延迟论，…………
可笑啊！ jplay想钱想疯了 请问，在哪买得到 这价格太坑爹了 dcbyan 发表于 2014-1-17 20:56 static/image/common/back.gif
还在低延迟论，…………
可笑啊！
延迟问题无论在理论上还是实践上确实对声音有影响的
延迟短，实时性高，声音听上去干净细致 968pst 发表于 2014-1-18 10:50 static/image/common/back.gif
延迟问题无论在理论上还是实践上确实对声音有影响的
延迟短，实时性高，声音听上去干净细致
我感觉缓冲设大比较宽厚耐听... chinabee 发表于 2014-1-18 11:01 static/image/common/back.gif
我感觉缓冲设大比较宽厚耐听...
软件上是的，和我用jplay时一样
如果是界面驱动buffer的话，尽量低延迟，延迟高声音就一团团堆积。。。
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