DAX Reserved channels

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  • Question
  • Updated 5 years ago
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Is it possible to do something to the DAX Reserved channels so they do not show up as an audio device with external programs?  If they are disabled in the control panel will they still do what they are designed to do?

Photo of Greg


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Posted 5 years ago

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Photo of Steve - N5AC

Steve - N5AC, VP Engineering / CTO

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Official Response
You cannot disable them.  Unfortunately, we do not know of a way to keep Windows from showing them either.

Ultimately, we could eliminate them entirely, but it is a significant investment to do so (it involves moving all of our DAX UDP code into a kernel mode driver).  The payoff is a cleaner looking system, but other than that, there's no benefit.  We discussed doing this at the outset, but it would have pushed out things like waterfall, etc. that are next on the list.  It was unanimous in our company to take the faster approach and focus on delivering more important radio features rather than take on another kernel mode driver project ;-)  Having said this, I think those of you that have used it will agree that it far surpasses running a sound card, cables, serial for PTT, etc. in terms of simplicity, flexibility and performance.

If I have my way, you guys are going to get tired of hearing me say this: sound cards are a compromise method for connecting to a digital radio.  The best way is for the digital mode program to directly consume UDP streaming data.  It avoids a classic two-clocks problem, eliminates latency, get's rid of meddling Windows resampling, etc.  I do everything I can to encourage folks that write digital mode programs to connect directly to us if possible.  I understand this is a "single radio" solution, but we have adopted the VITA-49 standard to make this a winning prospect for the digital mode program author -- hopefully over time other vendors will also support this standard for delivery of radio IF data.