Chuck, 

I notice an issue with all my URIx's where the TX CTCSS gets out of phase or something and the radios stop decoding it which makes RX audio kinda hiccup.  Is this what your speaking of?  I do have the machines pointed at ntp servers for time syncing.

de K0JSC

On Sun, Mar 29, 2015 at 11:16 AM, Chuck Henderson <rpt2@chuck.midlandsnetworking.com> wrote:
I have no problem running ntpd in my ACID servers that only have RTCMs interfacing with radios.  But when I use usb sound interfaces (URI or usb sound fob) then I find that ntpd causes anomalies in the audio.  Many people don't notice it but I do and anyone with a good ear will notice it and comment about the audio sounding strange and blame it on using a computer in the audio path.  

Turn ntpd off and just use ntpdate once per hour and the strange audio sounds go away.

I have seen this in various systems and while it is worse in slower single core systems, it is still slightly present even in high end quad core systems.
But it is not present at all when using only RTCMs.
Chuck   WB9UUS


 

On Sun, Mar 29, 2015 at 11:54 AM, kk6ecm <kk6ecm@gmail.com> wrote:
>
> I'm interested in using ntpd to keep my ACID server sync'd with date and
> time, and notice it is off, as configured from the CD. I set "chkconfig ntpd
> on, but wonder what servers I should use in ntp.conf. Also, has anyone used
> it and had any difficulties?
>
> thanks,
> Bob
> kk6ecm
>
>
>
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