turning here and there among the various forums to find a solution to the problem of the lack of audio when using Audacity ver. 1.3.4 beta (found in various repositories for Hardy Haron) and the presence of pulse audio, I noticed that the solution is not easy to find. In fact the application, while functioning properly, does not return any sound.
I solved this way: Install the utility of pulse audio on volumes and the management of individual instruments sound server
sudo apt-get install libasound2-plugins "pulseaudio-*" paman padevchooser paprefs pavucontrol pavumeter libflashsupport
Launch tools: Pulseaudio Device Manager from Applications > Audio and Video
Open Audacity and in Preferences> Audio I / O to search for and use the playback device: OSS: / dev / dsp
Now audacity begin sounding
I solved this way: Install the utility of pulse audio on volumes and the management of individual instruments sound server
sudo apt-get install libasound2-plugins "pulseaudio-*" paman padevchooser paprefs pavucontrol pavumeter libflashsupport
Launch tools: Pulseaudio Device Manager from Applications > Audio and Video
Open Audacity and in Preferences> Audio I / O to search for and use the playback device: OSS: / dev / dsp
Now audacity begin sounding
