Buffer除jitter，有效！

今天在雷爾斯聽了Mark Levinson當年著名的390S CD player，2004年時賣US$6700，
聲音真的非常好，顯然jitter極低，定位與音場非常穩定。

突然想起，記得這隻用上了buffer與精準的clock，趕緊查查資料，
沒錯，確實，

http://www.marklevinson.com/products/overview.asp?prod=no390s

Each bit of the digital audio signal is stored momentarily just prior to its transmission to the digital processor. The reference clock determines the precise moment when each bit is released from this memory buffer. This purely electronic process virtually eliminates transport-related jitter, whether of mechanical or electrical origin. Of course, another bit must be ready to be loaded into the buffer as the current bit leaves on its way to the processor. For this reason, the same crystal oscillator that controls flow of information out of the memory buffer also directs the digital servo that sets the rate at which data flows into the buffer.

果然，這招確實有效！
US$6700這價格，相對於其他CD player，我會說，太超值了～