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
anyway.
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.
Alan
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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