====== Audio 관련 스크립트 모음 ======
===== Ted's original audio script =====
Available from http://tedfelix.com/linux/linux-midi.html
  #!/bin/bash
  
  # Script to launch audio servers for music-making.
  
  case $1 in
  
    start )
      echo Starting JACK...
  
      # Start JACK
      # As of Ubuntu 12.10, a period of 128 is needed for good fluidsynth
      # timing.  (jackd 1.9.9, fluidsynth 1.1.5)
      # If you aren't running pulseaudio, you can remove the pasuspender line.
      pasuspender -- \
          jackd -d alsa --device hw:0 --rate 44100 --period 128 \
              &>/tmp/jackd.out &
  
      sleep .5
  
      echo Starting fluidsynth...
  
      # Start fluidsynth
      fluidsynth --server --no-shell -p "fluidsynth 1" --audio-driver=jack \
          --connect-jack-outputs --reverb=0 --chorus=0 --gain=0.8 \
          -o midi.autoconnect=false \
          /usr/share/sounds/sf2/FluidR3_GM.sf2 \
          &>/tmp/fluidsynth.out &
  
      sleep 1
  
      if pgrep -l jackd && pgrep -l fluidsynth
      then
        echo Audio servers running.
      else
        echo There was a problem starting the audio servers.
      fi
  
      ;;
  
    stop )
      killall fluidsynth
      killall jackd
      echo Audio servers stopped.
      ;;
  
    * )
      echo Please specify start or stop...
      ;;
  esac

===== 정해영의 audio.qsynth script =====
  #!/bin/bash
  
  # Script to launch audio servers for music-making.
  # from Ted's Linux MIDI Guide (http://tedfelix.com/linux/linux-midi.html)
  # modified by Haeyoung Jeong
  
  DEVICE=$2
  
  case $1 in
  
    start )
      if [ -z ${DEVICE} ]
      then
          echo You did not specify any sound card!
          exit 1
      fi
  
      PATTERN="\[${DEVICE}  "
      if grep -q "${PATTERN}" /proc/asound/cards; then
          echo Audio device ${DEVICE} found!
      else
          echo ${DEVICE} is not a valid sound card!
          exit 1
      fi
      echo Starting JACK using ${DEVICE}...
  
      # Start JACK
      # As of Ubuntu 12.10, a period of 128 is needed for good fluidsynth
      # timing.  (jackd 1.9.9, fluidsynth 1.1.5)
      # If you aren't running pulseaudio, you can remove the pasuspender line.
     pasuspender -- \
          jackd -d alsa --device hw:${DEVICE} --rate 48000 --period 128 \
                --nperiod 3 &>/tmp/jackd.out &
  
      sleep .5
  
      # Start Qsynth
      echo "Press Esc key within 3 seconds to skip Qsynth:"
      read -t 3 -rsn 1 input
      if [ "$input" = $'\e' ]; then
          echo "Skipping Qsynth..."
          if pgrep -l jackd
          then
              echo JACK server running.
          fi
      else
          echo Starting Qsynth...
          qsynth -m alsa_seq -a jack \
              --connect-jack-outputs --reverb=0 --chorus=0 --gain=0.8 \
              /usr/share/sounds/sf2/FluidR3_GM.sf2 \
              &>/tmp/qsynth.out &
          sleep 1
          if pgrep -l jackd && pgrep -l qsynth
          then
            echo Audio servers running.
          else
            echo There was a problem starting the audio servers.
          fi
      fi
  
      echo You may start qjackctl and PulseAudioJackSink \(post_jack\).
      echo Please run 'a2jmidid -e' if you have hardware MIDI devices connected.
      echo You may use 'a2j -e' instead.
  
      ;;
  
    stop )
      if pgrep -l qsynth
      then
          killall qsynth
      fi
      killall jackd
      echo Audio servers stopped.
      ;;
  
    * )
      echo Please specify start or stop...
      ;;
  esac

===== 정해영의 start_jack_uca200 script =====
  #!/bin/bash
  
  #echo "suspend 1" | pacmd
  
  jack_control start
  jack_control ds alsa
  jack_control dps device hw:CODEC
  jack_control dps rate 48000
  jack_control dps nperiods 3
  jack_control dps period 128
  sleep 5
  #a2jmidid -e &
  sleep 5
  qjackctl 2> /dev/null &
  
  process_id=$(pidof pavucontrol)
  if [[ -z $process_id ]]; then
      echo "Starting PulseAudio Volume Control..."
      pavucontrol 2> /dev/null &
  fi

===== 범용 스크립트 start_jack_generic =====
  #!/bin/bash
  
  #echo "suspend 1" | pacmd
  
  DEVICE=$1
  
  if [ -z ${DEVICE} ]
  then
      echo You did not specify any sound card!
      exit 1
  fi
  
  PATTERN="\[${DEVICE}  "
  if grep -q "${PATTERN}" /proc/asound/cards; then
      echo Audio device ${DEVICE} found!
  else
      echo ${DEVICE} is not a valid sound card!
      exit 1
  fi
  
  jack_control start
  jack_control ds alsa
  jack_control dps device hw:${DEVICE}
  jack_control dps rate 48000
  jack_control dps nperiods 3
  jack_control dps period 128
  sleep 5
  #a2jmidid -e &
  sleep 5
  qjackctl 2> /dev/null &
  
  process_id=$(pidof pavucontrol)
  if [[ -z $process_id ]]; then
      echo "Starting PulseAudio Volume Control..."
      pavucontrol 2> /dev/null &
  fi
  
사용 방법은 다음과 같다.
  $ start_jack CODEC
  Audio device CODEC found!
  --- start
  --- driver select "alsa"
  --- driver param set "device" -> "hw:CODEC"
  --- driver param set "rate" -> "48000"
  --- driver param set "nperiods" -> "3"
  --- driver param set "period" -> "128"

===== 정해영의 run_fluidsynth script =====
JACK 구동 명령어를 스크립트 내에 삽입하였다.  --- //2022/04/05 15:47//
  #!/usr/bin/env bash
  
  option="-a jack --connect-jack-outputs"
  
  if [ "$1" = "alsa" ] || [ "$1" = "-a" ] || [ "$1" = "-alsa" ]
      then
          option="-a alsa"
          echo
          echo "ALSA audio driver will be used (default: JACK)"
      elif ! pgrep -l jackd
      then
         echo
         echo "Starting JACK...!\n"
         echo "jackd -d alsa --device hw:Intel --rate 44100 --period 128 &"
         jackd -d alsa --device hw:Intel --rate 44100 --period 128 &
         echo "Sleeping five seconds.."
         sleep 5
  fi
  
  OIFS=$IFS; IFS=$'\n'
  array=($(find $HOME/sf2 -type f)); IFS=$OIFS
  
  echo
  echo "Soundfonts installed in $HOME/sf2: "
  i=0
  for var in "${array[@]}"
  do
      echo "[$i]:  $(du -sh ${var})" | \
          awk '{idx = split($3, parts, "/"); print $1, parts[idx], "-", $2}'
      i=`expr $i + 1`
  done
  echo
  echo -n "Select sf2 index number: "
  read -r input
  CMD="fluidsynth --server $option --reverb=0 --chorus=0 --gain=0.4 ${array[$input]}"
  $CMD

===== 정해영의 simple_synth 스크립트 =====
PulseAudio를 오디오 드라이버로 사용하는 매우 단순한 FluidSynth 구동 스트립트. 사운드 폰트 파일을 인수로 지정하지 않으면 FluidR3_GM.sf2가 로드된다.

  #!/usr/bin/bash
  
  if [ -z "$1" ]
    then
        SF=/usr/share/sounds/sf2/FluidR3_GM.sf2
    else
        SF=$1
  fi
  echo -e "\nSoundFont file: $SF\n"
  fluidsynth -a pulseaudio -m alsa_seq -o midi.autoconnect=1 -r 48000 -g 0.5 $SF
  sleep 5
  connect_midi_keyboard

===== connect_midi_keyboard =====
  aconnect -i
  aconnect -o
  echo
  aconnect "iCON iKeyboard" "FLUID Synth"