Volume control from bash?

[tatoosh]

Hello,

is there a way to volume control from a bash script like curl with port 4000?
Maybe you have a snippet for me to increase or decrease volume!?

Thx

[dusatvoj]

#!/bin/bash
VOL=3
if [ $1 = '+' ]
then
amixer set PCM -- $[$(amixer get PCM|grep -o [0-9]*%|sed 's/%//')+${VOL}]%

elif [ $1 = '-' ]
then
amixer set PCM -- $[$(amixer get PCM|grep -o [0-9]%|sed 's/%//')-${VOL}]%
elif [[ $1 =~ [gG][eE][tT] ]]
then
VOLLVL=$(amixer get PCM | grep -E '%' | awk '{print $4, $5}')
echo "Volume level = ${VOLLVL}"
else
echo "Bad input parameter (+/-/GET)"
fi

This could be solution, when you want to controll volume from bash.
I'm using Raspberry SSH android app and I'm using this script for it.