On Thu, Nov 8, 2018, at 23:16, Bill Somerville wrote: > On 08/11/2018 19:56, Mikael Nousiainen wrote: > > I've contacted PulseAudio developers and with them I was able to confirm > > that this is indeed an issue in PulseAudio when using a monitor input in > > certain cases. The audio does get heavily distorted (I was finally able to > > record it) and that is the reason why WSJT-X is unable to decode the > > signals. > > > > On the other hand, the distortion issue does not occur always and I was > > able to keep WSJT-X decoding FT8 in the background for several hours > > without any sync issues. Complete QSOs via bidirectional WebRTC connection > > to a transceiver (using an IC-7300) work very well also! The software I'm > > testing is a ham radio remote control server written by me... > > > > Thanks for the quick answers! > > > > -Mikael > > Hi Mikael, > > let's hope the pulseaudio developers can fix this quickly as correctly > working audio loopbacks are essential for SDR users also. Do you know > the "certain cases" are that cause the issue? > > 73 > Bill > G4WJS.
Hi Bill, They seem to have an idea of what the underlying bug is, see discussion here: https://lists.freedesktop.org/archives/pulseaudio-discuss/2018-November/030608.html I was not able to find a clear pattern. Sometimes it works, sometimes restarting PulseAudio, the browser and WSJT-X helps, sometimes it doesn't. Not exactly sure what they mean with "rewinding" the monitor ... sounds like it may have something to do with latency/jitter buffers. 73, Mikael OH3BHX _______________________________________________ wsjt-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/wsjt-devel
