Slider sets its value to 0 instead of the awk output.

[LucyCiara]

How do I set the volume to the system volume if not like this? (My system volume is 95% and the awk output is "95")

[hypernova7]

Use printf instead of print

[LucyCiara]

It seems to give the same result for the widget, even tho the line break is removed from the awk output

[hypernova7]

[hypernova7]

Try using back stick instead of double quotes and defpoll instead of defvar

(defpoll outputVolume :interval "1s" `awk -F'[][]' '/Left:/ { printf substr($2, 1, length($2)-1)}' <(amixer sget Master)`)