init

.config/i3blocks/volume/README.md

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+# volume
+
+Shows the current system volume. The first parameter sets the step (and units
+to display). The second parameter overrides the mixer selection.
+See the script for details.
+
+Scrolling on the block changes the volume. Right clicking toggles mute.
+
+![](volume.png)
+
+# Usage
+
+This block can be run on an interval or by signal. To run the block using a
+signal, it is recommended to add the following to your i3 config.
+
+```
+# change volume or toggle mute
+bindsym XF86AudioRaiseVolume exec amixer -q -D pulse sset Master 5%+ && pkill -RTMIN+10 i3blocks 
+bindsym XF86AudioLowerVolume exec amixer -q -D pulse sset Master 5%- && pkill -RTMIN+10 i3blocks
+bindsym XF86AudioMute exec amixer -q -D pulse sset Master toggle && pkill -RTMIN+10 i3blocks
+```
+
+where the number `10` in `-RTMIN+10` can be replaced to another signal number,
+as long as it agrees what you put for `signal=` in your i3blocks config.
+
+
+# Config
+
+```
+[volume]
+command=$SCRIPT_DIR/volume
+#LABEL=♪ 
+LABEL=VOL 
+interval=once
+signal=10
+#STEP=5%
+#MIXER=[determined automatically]
+#SCONTROL=[determined automatically]
+#NATURAL_MAPPING=0
+```
+For PulseAudio users, MIXER is usually "pulse" or "default".
+For Jack/Jack2 users, MIXER is usually "jackplug".
+For ALSA users, use "default" for your primary card, or "hw:#" 
+where # is the number of the card desired.
+
+For a list of available SCONTROL options, use `amixer -D $MIXER scontrols`.
+
+If `NATURAL_MAPPING` is set to a non-zero value, the `-M` flag is used for `amixer`, enabling
+a volume mapping more natural for the human ear, as used in alsamixer.

.config/i3blocks/volume/i3blocks.conf

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+[volume]
+command=$SCRIPT_DIR/volume
+#LABEL=♪ 
+LABEL=VOL 
+interval=once
+signal=10
+#STEP=5%
+#MIXER=[determined automatically]
+#SCONTROL=[determined automatically]

.config/i3blocks/volume/volume

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+#!/usr/bin/env bash
+# Copyright (C) 2014 Julien Bonjean <julien@bonjean.info>
+# Copyright (C) 2014 Alexander Keller <github@nycroth.com>
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#------------------------------------------------------------------------
+
+# The second parameter overrides the mixer selection
+# For PulseAudio users, eventually use "pulse"
+# For Jack/Jack2 users, use "jackplug"
+# For ALSA users, you may use "default" for your primary card
+# or you may use hw:# where # is the number of the card desired
+if [[ -z "$MIXER" ]] ; then
+    MIXER="default"
+    if command -v pulseaudio >/dev/null 2>&1 && pulseaudio --check ; then
+        # pulseaudio is running, but not all installations use "pulse"
+        if amixer -D pulse info >/dev/null 2>&1 ; then
+            MIXER="pulse"
+        fi
+    fi
+    [ -n "$(lsmod | grep jack)" ] && MIXER="jackplug"
+    MIXER="${2:-$MIXER}"
+fi
+
+# The instance option sets the control to report and configure
+# This defaults to the first control of your selected mixer
+# For a list of the available, use `amixer -D $Your_Mixer scontrols`
+if [[ -z "$SCONTROL" ]] ; then
+    SCONTROL="${BLOCK_INSTANCE:-$(amixer -D $MIXER scontrols |
+                      sed -n "s/Simple mixer control '\([^']*\)',0/\1/p" |
+                      head -n1
+                    )}"
+fi
+
+# The first parameter sets the step to change the volume by (and units to display)
+# This may be in in % or dB (eg. 5% or 3dB)
+if [[ -z "$STEP" ]] ; then
+    STEP="${1:-5%}"
+fi
+
+# AMIXER(1):
+# "Use the mapped volume for evaluating the percentage representation like alsamixer, to be
+# more natural for human ear."
+NATURAL_MAPPING=${NATURAL_MAPPING:-0}
+if [[ "$NATURAL_MAPPING" != "0" ]] ; then
+    AMIXER_PARAMS="-M"
+fi
+
+#------------------------------------------------------------------------
+
+capability() { # Return "Capture" if the device is a capture device
+  amixer $AMIXER_PARAMS -D $MIXER get $SCONTROL |
+    sed -n "s/  Capabilities:.*cvolume.*/Capture/p"
+}
+
+volume() {
+  amixer $AMIXER_PARAMS -D $MIXER get $SCONTROL $(capability)
+}
+
+format() {
+  
+  perl_filter='if (/.*\[(\d+%)\] (\[(-?\d+.\d+dB)\] )?\[(on|off)\]/)'
+  perl_filter+='{CORE::say $4 eq "off" ? "MUTE" : "'
+  # If dB was selected, print that instead
+  perl_filter+=$([[ $STEP = *dB ]] && echo '$3' || echo '$1')
+  perl_filter+='"; exit}'
+  output=$(perl -ne "$perl_filter")
+  echo "$LABEL$output"
+}
+
+#------------------------------------------------------------------------
+
+case $BLOCK_BUTTON in
+  3) amixer $AMIXER_PARAMS -q -D $MIXER sset $SCONTROL $(capability) toggle ;;  # right click, mute/unmute
+  4) amixer $AMIXER_PARAMS -q -D $MIXER sset $SCONTROL $(capability) ${STEP}+ unmute ;; # scroll up, increase
+  5) amixer $AMIXER_PARAMS -q -D $MIXER sset $SCONTROL $(capability) ${STEP}- unmute ;; # scroll down, decrease
+esac
+
+volume | format