On Thu, 10 Mar 2016 13:13:14 +0100, Gerhard Zintel wrote: >On Thursday 10 March 2016, Clemens Ladisch wrote: >> Can you look at the output with an oscilloscope? >Or record with the input of another sound card / computer and look at >it in e.g. Audacity? Or simply play a sinus tone and mix the tone and the out of phase tone to mono by a mixer or move two speakers face to face, one playing the tone, the other the out of phase tone. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user