I have a concern about this. As part of NTP version 4, there is support for decoding the audio signal from the radio station WWV to provide a fairly accurate reference clock. The code currently hard codes the use of /dev/audio, but the NTP project has been very good about incorporating code changes. However, it sounds like you are saying that in the post Boomer world, there will be no way to access the audio device directly without going through the mixer, right?
Of course, this is audio input, so maybe that doesn't apply. Using the mixer will likely make the WWV refclock useless. It is essential that the latency between the time that the signal reaches the hardware and the time that the audio arrives in the ntpd daemon's buffer be as small as possible. Failing that, the delays must be consistent and without jitter. Is this going to be a problem post Boomer? Garrett D'Amore wrote: > Bart Smaalders wrote: >> Garrett D'Amore wrote: >>> Please let us know if there are any concerns about any of the above. >>> >> >> >> This looks good, Garrett. Can we also obsolete the ability to >> disable the mixer in mixerctl? I don't want to force all applications >> to have to deal with open calls to /dev/audio blocking indefinitely. > > Yes, I'm sorry -- I thought I had already indicated this in the > inception materials. It is not possible to disable the mixer. All > support for any kind of "exclusive mode" access was removed in the > Boomer gate a long time ago. :-) > > I suppose there might be certain *ancient* applications this breaks... > but such applications would not have played well with other uses of the > audio device anyway (include any use by desktop environments like gnome!) > > -- Garrett > -- blu "Murderous organizations have increased in size and scope; they are more daring, they are served by the most terrible weapons offered by modern science, and the world is nowadays threatened by new forces which, if recklessly unchained, may some day wreak universal destruction." - Arthur Griffith, 1898 ---------------------------------------------------------------------- Brian Utterback - Solaris RPE, Sun Microsystems, Inc. Ph:877-259-7345, Em:brian.utterback-at-ess-you-enn-dot-kom
