2014年8月14日 星期四

NAD M51 DAC


http://nadelectronics.com/products/masters-series/M51-Direct-Digital-DAC

這隻有個有趣之處,音量說是用35bits DSP處理跑出來的,
The extreme headroom afforded by the 35-bit architecture allows for a DSP-based volume control that does not reduce resolution. Even with 24-bit high definition signals, the output can be attenuated by 66dB (very, very quiet) before bit truncation begins.
嗯...這不知是啥道理,那個66該是35-24=11,11*6=66;

假設最後轉換成類比的DAC電路還是24bits,
那麼音量每壓低6dB,振幅輸出就是少一半,24bits的數位資料最高一個bit就是0,最低一個就砍掉了...
有差嗎?

又,有HDMI輸入喔~


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