On Fri, Nov 13, 2009 at 07:56:13PM +0000, Folderol wrote:
> The effect you can get with a system with poor stability but very strong
- To generate a clock that is good enough for audio sampling you'll
need a analog PLL based on an Xtal oscillator, and with less than
1ns (nanosecond) jitter in the audio BW, and preferably even less.
- All AD converters require a clock that is much higher than
the sample frequency. For example the TI ADS1278 requires
27 or 37 MHz.
- If you want the soundcard to lock to a reference provided by
the master (PC), all you have is the timing of Ethernet
messages. For example the PC could send a message every
millisecond. With the above clock frequencies that would
mean a PLL multiplier with a ratio of 27000:1, somewhat
more than the 1:1 you seem to assume. It would need a BW
of a fraction of a second. Can be done, but not simple.
Io lo dico sempre: l'Italia è troppo stretta e lunga.
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