On 06/16/2018 06:07 PM, Bill Somerville wrote: Hi Bill & All,
> the Qt naming of audio streams is not helpful but you should not need of > adjust the Rx audio stream level in the digital domain, in fact doing so > can only degrade the signal. Rx audio level adjustments must be made > before the signal is digitized and any digital gain controls should be > left at 100%. If I do not reduce the level using pavucontrol, the thermometer is always red. This is probably not a good situation. > The slider that used to exist in WSJT-X beside the thermometer level > indicator never adjusted the levels fed to the decoders, it only > adjusted the scaling of the thermometer indicator and the level fed to > the waterfall and 2D spectrum plots. The slider was removed exactly > because this sort of misunderstanding that it had any bearing on decoding. Many thanks, Bill. Now I understand better. I still have to find what the right audio level is, on the interface of this device. I'm using the headphone interface because this is the only audio interface on this device. The manual says nothing about the level and impedances. There are definitions about what the line level is, in the case of the line interface, but this is not the same as the headphone interface. On such devices as mine here, the military aviation headset interface does probably not apply, as available on the David Clark H10-76 headset. I see only the possibility to try what could be good and was not. I'm not sure that an external sound card via the USB interface would be better. Best wishes, Claude (DJ0OT) ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
