RMS goes from -700,00 dB to -61,09 dB without sound

Yes, I can confirm the output. It is similar here.

Also the -d option does not always show the output because the command is sent to an existing instance of A.r that does not know about the terminal-window. A.r should restart and show output in all cases.

Thanks for your report.

I'm not sure the problem come from audio-recoder.
When I perform a recording with audacity without sound it appears some noise (see attached file).

In my mind this problem was not present with Ubuntu 13.04. Maybe a new version of audio driver?
Maybe it's a pulse problem?

I just performed the test on the same computer with a live USB. The problem is not present with Ubuntu 13.04 and audio-recoder 1.1.2.

I see the same thing on Ubuntu 13.04 with audacity maybe it only the freq sampling.

For information same problem with Ubuntu 14.04 Beta 2.

Same problem here with Ubuntu 14.04.2 LTS and audio-recorder 1.4-5.

Even setting the volume threshold to -50dB does not prevent audio-recorder to start recording the -61.42dB noise