DAX doesn't work with PTT v1.6

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  • Updated 3 years ago
(I just wanted to pull this issue out of another thread so it can potentially get the attention of Flex engineering as a potential bug in v1.6 and hopefully fixed quickly if it is a bug)

In SSB mode, DAX via DAX Audio TX stream doesn't get transmitted if transmit is initiated by PTT (front or back panel connection) but does get transmitted if transmit is initiated by MOX.  

73, Barry N1EU
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Barry N1EU

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Posted 3 years ago

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Ken - NM9P, Elmer

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I don't think I saw the other post to which you refer.
Which way are you anticipating that it should work?
PTT override the DAX input?
or PTT allow DAX input?
Or is the issue that the MOX button should be consistent with the PTT?
I am not clear.

Ken - NM9P
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Barry N1EU

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DAX is selected (blue).  PTT enables transmit.  DAX Audio TX stream is transmitted.  (that's what is expected but doesn't happen)

(I hope that is understandable - other thread is https://community.flexradio.com/flexradio/topics/mic-ptt-not-working-when-dax-enabled)

73, Barry N1EU
(Edited)
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KC2QMA_John

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It should be a simple option that you can select from the radio setup "Phone" tab.
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Ken - NM9P, Elmer

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@Barry, You can do that now, if you select PC as the mike input and link it to the active audio source via the windows audio.  Not as clean as selecting a DAX Channel directly, but it works.

But I would like to see an available option selection.  
That would satisfy the Contester/voice keyer crowd, and the others who wish to use DAX input with their footswitch - i.e. using external audio processors, playing lengthy recorded audio files, etc.  

Perhaps this DAX/PTT function option selection could be linked at part of the MIC Profile?  That would be handy!

Ken - NM9P
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Barry N1EU

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thanks for the work-around Ken!
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Ken - NM9P, Elmer

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Perhaps there could also be an option to allow "MIKE VOX active when DAX button activated?" 

This may or may not be technically possible, due to internal audio chain routing.  But if it is, then it would be nice to be able to use VOX in a contest while also using my logger's voice keyer.

Ken - NM9P
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KC2QMA_John

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The main downside to passing audio using the "PC" input is the fairly high audio latency. One way to get lower latency is to use an audio interface with a true ASIO driver.
(Edited)
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Barry N1EU

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Ken NM9P explained that it works this way by design so a contest voicekeyer can key the rig in DAX via MOX and the user can still talk in MIC via PTT.

SmartSDR is missing the feature that PowerSDR has.  In PowerSDR, it is a checkbox "Allow PTT to override/bypass VAC for Phone".  In SmartSDR, it would be a checkbox "Allow PTT to override/bypass DAX for Phone".  Currently that invisible checkbox is checked all the time and I'm sure many of us would like to uncheck it.

This obviously now becomes a SmartSDR feature request to add that checkbox to the rig setup screen.

The lack of this feature impacts a lot of phone ops interested in audio.

73, Barry N1EU.
(Edited)