I am trying to make a shell script to control volume on the system.

pactl -- set-sink-volume 0 -10%

that line works perfect from the command line. However if I create a shell script I get "invalid volume specification" when I run the script. The script has only one line in it which is shown above. I am not experienced in shell scripts so if I am doing something wrong, correct me. I called the script file VDN.sh and execute using the command sh VDN.sh I am so close to finishing this project and this is what stands in my way. PLEASE HELP.

I have changed the relative volume setting to a specific one and get same error.

maybe
?

P.S. Which "shell"?

I tried your suggestion but still same problem. This is on Fedora 18. I was so hoping your thought would work. DARN THE LUCK