Clock Speed vs. DAC Speed????

Know_Talent

Active Member
Can anybody here please explain the difference between system clock speed and DAC processing speed and how they are related?

I'll do a wiki search but I just wondered if anyone in here wanted to chime in.


For example, the Cary CD 306 SACD Pro uses a DF1706 and quad PCM1792s at 192khz and mentions internal sampling rates of up to 768khz in its literature. If the DAC is only capable of processing data at 192khz what is the significance of the 358, 512 and 768khz figures???

http://www.datasheetcatalog.org/datasheet2/0/01jo4uxe48eey6k2glz5oagdfscy.pdf
 
The incoming data speed and the DAC processing speed are two different things. An oversampling DAC uses a different (read HIGHER) processing speed to decode the digital signal. So an 8x OS DAC would process a 96KHz signal at 8 x 96KHz.
There are CD players etc that mention on their front panel that their DAC is operating at 384KHZ. Personally I don't buy that. 384KHz is 8 x 48KHz. ANd 48KHz is DVD audio spec. For a CDP to process a 44.1KHz signal at 8x oversampling the frequency would be 352.8KHz.
 
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