In /usr/bin/padsp line 51:
				PADSP_DEBUG=$(( $PADSP_DEBUG + 1 ))
                                                ^----------^ SC2004: $/${} is unnecessary on arithmetic variables.


In /usr/bin/padsp line 74:
shift $(( $OPTIND - 1 ))
          ^-----^ SC2004: $/${} is unnecessary on arithmetic variables.

For more information:
  https://www.shellcheck.net/wiki/SC2004 -- $/${} is unnecessary on arithmeti...