[ntp:questions] Using NTP to calibrate sound app

David Woolley david at ex.djwhome.demon.invalid
Sat Jan 26 20:00:50 UTC 2013


unruh wrote:
> On 2013-01-26, David Woolley <david at ex.djwhome.demon.invalid> wrote:

>>   You may well find that you don't have to measure the sound generator 
>> frequency because it may use the same crystal as the main clock.
> 
> Unfortunately ntpd does NOT change the crystal. It changes the way that
> software interprets the output of that crystal (eg do 100000000
> vibrations equal a second or do 10000002 vibrations?)
> 

I was assuming that, if they shared a common crystal, one would simply 
read the ntpd frequency correction to get the frequency correction for 
the audio.



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