I tested both files with the same version of audacity on amd64.
Both files sounds equal and I can't reproduce any of your problems. This indicates a driver problem somewhere in the audio stack (portaudio, pulseaudio, alsa).
I tested both files with the same version of audacity on amd64.
Both files sounds equal and I can't reproduce any of your problems. This indicates a driver problem somewhere in the audio stack (portaudio, pulseaudio, alsa).