Audio (alsa or pulseaudio) doesn't work on SimpleScreenRecorder

on my laptop Lenovo Thinkpad X260, I can perfectly record videoscreencast mkv or mp4, but the audio doesn’t work.

If I choose “alsa”, I can record the video, but no sound.
If I choose the audio option “pulseaudio”, there is an error and I can’t record the video neighter.

Does somebody knows a solution?

Uncomment the line

load-module module-oss-mmap device="/dev/dsp" sink_name=output source_name=input

in /usr/local/etc/pulse/

Then restart PulseAudio:

$ pulseaudio --kill
$ pulseaudio --start

Not solved. The first command (pulseaudio --kill) didn’t work, it said there is no pulseaudio service running.

I tried the second one and then I tried the SimpleScreenRecorder and it says the error of the screenshot.