menuaudio.sh

#!/bin/bash

# Menuaudio.sh is a shell script to start/stop Jack and do some audio things. It uses/creates
# a settings file thats callled "menuaudio.cfg".
# Original unmodified example script written by oToGamez (www.pro-toolz.net).

# Define variables.
# This is your config file:
cfgfile="`dirname $0`/menuaudio.cfg"
# Use that file as the source for variables:
source $cfgfile


# If received SIGINT (i.e. Ctrl + C) then reset screen and exit. See "trap -l"
# (notice that R is a function)
trap "R;exit" 2


# This is the menu:
#<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>
     M0 () { TPUT  7 2; echo -en       "Jack audio daemon: start               ";}
     M1 () { TPUT  8 2; echo -en       "                 : kill                ";}
     M2 () { TPUT  9 2; echo -en       "Check Midi       : port numbers        ";}
     M3 () { TPUT 10 2; echo -en       "                 : output              ";}
     M4 () { TPUT 11 2; echo -en       "Check Alsa       : device/card numbers ";}
     M5 () { TPUT 12 2; echo -en       "Pulseaudio       : start               ";}
     M6 () { TPUT 13 2; echo -en       "                 : stop                ";}
     M7 () { TPUT 14 2; echo -en       "                 : PAVUControl         ";}
     M8 () { TPUT 15 2; echo -en       "Config file      : create/edit         ";}
     M9 () { TPUT 16 2; echo -en       "                 : delete              ";}
     M10() { TPUT 17 2; echo -en       "                 : view                ";}
     M11() { TPUT 18 2; echo -en "\e[32mHelp                                  \e[0m";}
     M12() { TPUT 19 2; echo -en "\e[31mExit                                  \e[0m";}
# Last Menu item is:
     LM=12
#<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>








# These are some more functions that are needed by the script. You don't ever need to edit this.
#<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>
# Reset = clear screen, clean terminal and no inverse:
      R(){ clear;stty sane;echo -en "\e[27m";}

   TPUT(){ echo -en "\e[${1};${2}H";}                # Print text starting on line $1 and
                                                     # column $2.
   MARK(){ echo -en "\e[7m";}                        # Reverse video characters.
 UNMARK(){ echo -en "\e[27m";}                       # Reset reverse.
   HEAD()
         {
           TPUT 1 1
           echo -e "\e[34;1m\e(0lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk\e(B"
           echo -e     "\e(0x\e(B              Audio menu             \e(0x"
           echo -e         "\e(0mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj\e[0m\e(B"
           echo -e "Use ↑ and ↓ keys to select and Enter"
           echo -e "to execute."
         }
  ARROW()
         {
           read -s -n3 key 2>/dev/null >&2
           if [[ $key = $(echo -en "\e")[A ]];then echo up;fi   # Up in a terminal is:
                                                                # "escape char."A.
           if [[ $key = $(echo -en "\e")[B ]];then echo dn;fi;  # Dn in a terminal is:
                                                                # "escape char."B.
         }
# More functions (build menu and catch cursor movement):
   i=0
   MENU(){ for each in $(seq 0 $LM);do M${each};done;}
    POS(){ if [[ $cur == up ]];then ((i--));fi
           if [[ $cur == dn ]];then ((i++));fi
           if [[ $i -lt 0   ]];then i=$LM;fi
           if [[ $i -gt $LM ]];then i=0;fi;}
REFRESH(){ after=$((i+1)); before=$((i-1))
           if [[ $before -lt 0  ]];then before=$LM;fi
           if [[ $after -gt $LM ]];then after=0;fi
           if [[ $j -lt $i      ]];then UNMARK;M$before;else UNMARK;M$after;fi
           if [[ $after -eq 0 ]] || [ $before -eq $LM ];then
           UNMARK; M$before; M$after;fi;j=$i;UNMARK;M$before;M$after;}
   INIT(){ R;HEAD;MENU;}
# SC determines if cursur is selected?
     SC(){ REFRESH;MARK;$S;cur=`ARROW`;}
# ES is the footer:
     ES(){ echo -en "\n\e[31mPress Enter for main menu...\e[0m";read;INIT;};INIT
#<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>=<>






# And now, the actual commands to be executed:
while [[ "$O" != " " ]]; do case $i in
########
# JACK #
########
#  Jack audio daemon start
0) S=M0;SC;if [[ $cur == "" ]]; then R
   jackd -d alsa --device hw:$sndcrd &
   sleep 1
   # See https://kx.studio/News 2019-03-22: we'd better kill jackdbus.
   # pkill -9 jackdbus
   # Route Jack via PullseAudio on my 2nd so I can listen to Youtube
   # as well as Jack (restart Chrome!).
   # Handy commands:
   # pactl info
   # pacmd list-sinks
   # Dont use 'pacmd set-default-sink 1' (makes the Trust C-Media PCI default)
   if [[ $jack_sink == "y" ]]
      then
      pactl load-module module-jack-sink &
      pactl set-default-sink jack_out &
      sleep 1
      echo -e "\n\e[34mNow open PAVUcontrol and set 'jack_out' as Chrome's playback device.\e[0m"
   fi
   # Make Alsa's Midi also visible as Jack Midi.
   if [[ $a2j == "y" ]]
      then
      a2j &
      sleep 0.5
   fi
ES;fi;;

#  Jack audio daemon stop
1) S=M1;SC;if [[ $cur == "" ]]; then R
   pkill -9 jackdbus
   killall jackd
   sleep 1
ES;fi;;


########
# MIDI #
########
#  Check Midi port numbers
2) S=M2;SC;if [[ $cur == "" ]]; then R
   aconnect -io
ES;fi;;

# Check Midi output:
3) S=M3;SC;if [[ $cur == "" ]]; then R
   echo "Type in Midi port number:"
   read portnumber
   aseqdump -p $portnumber
ES;fi;;




########
# Alsa #
########
4) S=M4;SC;if [[ $cur == "" ]]; then R
   echo -e "Determine the number of your soundcards/audio devices. Watch the output in blue below. It's the first number in the line. Numbering starts with 0. So if you have two sound cards then the number of your second card is 1. \n"
   echo -en "\e[34m"         # Make the following output blue
   cat /proc/asound/cards
   echo -en "\e[0m"
ES;fi;;


#########
# PULSE #
#########
#  Pulse start:
5) S=M5;SC;if [[ $cur == "" ]]; then R
   pulseaudio --start -v
ES;fi;;

# Pulse kill:
6) S=M6;SC;if [[ $cur == "" ]]; then R
   pulseaudio --kill
ES;fi;;

#  PA VU Control:
7) S=M7;SC;if [[ $cur == "" ]]; then R
   echo -e "\e[34;1mPAVUControl is running. \e[0m"
   pavucontrol
ES;fi;;


###############
# Config file #
###############
# Create/edit config file:
8) S=M8;SC;if [[ $cur == "" ]]; then R
   echo -e "Determine the number of your soundcards/audio devices. Watch the output in blue below. It's the first number in the line. Numbering starts with 0. So if you have two sound cards then the number of your second card is 1. \n"
   echo -en "\e[34m" # Make the following output blue
   cat /proc/asound/cards
   echo -en "\n\e[0m" # End of blue text
   # If not exist then create config file and fill it with the variables:
   if [ ! -e $cfgfile ]
      then
         echo -e "=> No config file found that is named $cfgfile. Going to create one...\n"
         touch $cfgfile
         echo -e "sndcrd=0"    >> $cfgfile
         echo -e "a2j=n"       >> $cfgfile
         echo -e "jack_sink=n" >> $cfgfile
   fi
   echo -e "=> Config file is: $cfgfile"
      function set_config ()
        {
           sed -i "s/^\($1\s*=\s*\).*\$/\1$2/" $cfgfile
           source $cfgfile
        }
   set_config
   echo -e "\nType in the number of your sound card/audio device:"
      read new_sndcrd
      set_config sndcrd $new_sndcrd
   echo -e "\nWant to make Alsa's Midi also visible as Jack Midi? [y/n]"
      read new_a2j
      set_config a2j $new_a2j
   echo -e "\nWant to sink Jack to PulseAudio? [y/n]"
      read new_jack_sink
      set_config jack_sink $new_jack_sink
   echo -e "Your config file now looks like this: \n"
   cat $cfgfile
ES;fi;;

# Delete config file:
9) S=M9;SC;if [[ $cur == "" ]]; then R
   echo -e "Delete $cfgfile? (y/n)"
   read choice01
   if [[ $choice01 == "y" ]]
      then
         rm $cfgfile
      else
         echo "You chose n or typed in the wrong letter. Not deleting $cfgfile."
   fi
ES;fi;;

# Show config file:
10) S=M10;SC;if [[ $cur == "" ]]; then R
    echo -e "Your config file is: $cfgfile, and its contents is:\n"
    cat $cfgfile
ES;fi;;



########
# HELP #
########
11) S=M11;SC;if [[ $cur == "" ]]; then R
    echo -e  "\e[32;1m\e(0lqqqqqqqqqqqqk "
    echo -e          "x\e(B    Help    \e(0x"
    echo -e  "\e[32;1m\e(0mqqqqqqqqqqqqj  \e[0m\e(B"
    echo -e  "\
1. You can only get audio in Firefox AFTER starting Pulseaudio, not before!

2. Store/restore alsamixer settings for card 2:

   sudo alsactl (re)store 2

Beware! Store alsa settings *before* switching from input to output (F3 and F4 etc.). Else: no store.

3. Jack VU meter:

   (jmeters -t vu -f mbrl \"Left channel\" \"Right channel\" &); sleep 0.1;\
   jack_connect system:capture_1 jmeters:in-1; jack_connect system:capture_2 jmeters:in-2

Note: the jmeters backround process is killed after closing its window.

4. Stop PA from respwawning. Uncomment the following 2 lines from /etc/pulse/client.conf:

   autospawn = no
   daemon-binary = /bin/true

For newer Linux systems (i.e. Debian 10):

   systemctl --user mask pulseaudio.socket
   systemctl --user stop pulseaudio

5. Some handy PulseAudio commands:

   pactl info
   pacmd list-sinks
"
ES;fi;;

12) S=M12;SC;if [[ $cur == "" ]]; then R
    clear
    exit 0
fi;;


esac; POS; done; R