How to set DAX TX Gain programmatically?

Howard K7JNX

I'd like to modify the DAX TX gain from a program but cannot discover how to do it by watching with Wireshark.

When I manipulate the DAX RX gain slider in SmartSDR DAX 3.7.3 it is easy to see commands going to the radio, e.g. C37097|audio stream 0x4000009 slice 0 gain 28 when I adjust the slice A gain slider.

But no command at all is shown when I adjust the TX gain slider. ???? (If I click off the blue TX button I see C37124|stream remove 0x84000001, and if I click it on again I see C37126|stream create type=dax_tx)

I have also tried using the TXGain and Gain properties of a FlexLib DAXTXAudioStream object, but although I can get and set them, they have no effect.

David Decoons, wo2x

I may be wrong but I believe the slider changes the attenuation in Windows under sound devices, not in the radio.

Dave wo2x

Howard K7JNX

Interesting idea (controlling TX level via Windows sound device volue), but this is apparently not the case. I tried bringing up System → Sound → All Sound Devices → Properties for DAX Audio TX. Manipulating the volume there has absolutely no effect on the level between e.g. WSJT-x and the Flex, nor does manipulating the SmartSDR DAX TX Gain Slider make any changes to the Windows DAX Audio TX device slider