[GTALUG] Command doesn't work in script but works on command line?

Hello, I'm having trouble with a simple script. It adds a second sounccard. This command works on the command line but not in a script. Any ideas why? The command line is: alsa_out -j secondInterface -d hw:3 -c 6 or in a script : #!/bin/bash alsa_out -j secondInterface -d hw:3 -c 6 I have also tried the shebang #!/bin/sh  with the same result. alsa_out is in /usr/bin . I'm on Ubuntu 20.04. Thanks for any advice here. Jim