On Thu, 28 Mar 2013 02:50:17 GMT, unruh <un...@invalid.ca> wrote:
> >He wants to calibrate the onboard clock on a cellphone/tablet to about >10PPM for an app he is writing to act as a tuner which is supposed to be >better than 1 cent in its tuning ability. He is willing to spend a few >hours on this (ie, the time accuracy needs to be about 10-100 ms), but then >let the clock freewheel except perhaps an >occasional check that the calibration is still good. >At least that is how I understand it. > >This app is to be sold to every musician in the world, and he is >wondering whether he should hard code the NIST IP into the phone to use >as an ntp server. (NONONONONO) or perhaps use the pool. I think he is >worried that since the pool does not apparently use NIST as the source >for the time, that the time in the pool is not good enough. He does not >really understand ntp and the pool, and GPS time and thus is worried >that using the pool might not be good enough for his needs. You really should read my posts before responding. No, I do not intend to hard-code NIST or any other server. I never said I wanted to. No, the app is not intended for all musicians. It is intended for professional piano tuners only. I sell about one per day. And I never said the pool would not be good enough for my needs. I only asked about the relative benefits of the pool vs. NIST, which "E-mail sent...Blacklists" answered very nicely. Robert Scott Hopkins, MN _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
