[ntp:questions] New to group: radio/audio interest

Alan Corey ab1jx at devio.us
Sat May 12 04:45:58 UTC 2012

Well, I don't have it working yet.  I set up a little dump routine to 
write some audio data to a file and it's all zeroes.  I wrote a seperate 
little program to read from the audio port and write to a file and that 
gets all zeroes too.  So I'm still digging.  NTPD can't choose a frequency 
because it isn't hearing anything on any of them.  It gets samples but no 
audio.  The hardware's working because Fldigi gets audio from the same 
radio and sound card.

I did find the mentions of not using more than 1 audio codec per computer. 
On the CHU driver page, end of the 2nd paragraph, and on the WWV page 
about 2 sentences earlier. "In this implementation only one audio driver 
and codec can be supported on a single machine."  Even then I don't know 
that you could run 2 instances of the same driver concurrently, so I don't 
think there's much benefit from using 2 channels of audio.  In my case of 
wanting to have CHU and WWV, by this it can't be done.  I'm closer to CHU 

I like to put projects like this on a little free web site I've set up. 
The url is http://ab1jx.webs.com/toys/ntp/index.html  There's the main 
index and 2 daily pages so far, and some man pages and header files.

OpenBSD's native audio is called just "audio", traceable from the kernel 
level sound card drivers through upper levels that programs like ntpd 
connect to.  It seems to have come from NetBSD, so they probably use it 
too.  It's a name that's not really a name, so it's hard to tell when 
they're talking about the concept and when it's the name of this 
particular system.


On Wed, 9 May 2012, Harlan Stenn wrote:

> Alan,
> Also please see:
> http://bugs.ntp.org/show_bug.cgi?id=2177#c2
> http://bugs.ntp.org/buglist.cgi?quicksearch=audio
> H

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