Okay, as the backtrace shows the culprit is https://github.com/mixxxdj/mixxx/blob/352f75428b5c8e0ab014206939c085c49b1ccc4b/src/waveform/renderers/waveformrenderbeat.cpp#L90-L92 though I just don't get (yet) how this is related to passthrough...
Okay, as the backtrace shows the culprit is /github. com/mixxxdj/ mixxx/blob/ 352f75428b5c8e0 ab014206939c085 c49b1ccc4b/ src/waveform/ renderers/ waveformrenderb eat.cpp# L90-L92
https:/
though I just don't get (yet) how this is related to passthrough...