audio bookmark manager

hardware/software used:

Satellite Pro ET10-G-106
A4tech TK-5 Mini Numeric Keypad
Lubuntu 18.04.6 LTS
GNU bash, version 4.4.20(1)-release (x86_64-pc-linux-gnu)

usage, every laptop / 2 in 1 laptop / or just a tablet

1. setup Audacious (4.3)

sudo add-apt-repository ppa:ubuntuhandbook1/apps
sudo apt update
sudo apt -y install audacious

File/Settings/Appearance/Restart in GTK (legacy) mode

2. setup xbindkeys

sudo apt -y install xbindkeys

3. setup xev

sudo apt -y install xautomation

4. (optional) check keycodes in terminal via xev (A4Tech TK-5):

keycode 87 - KP_End ( rewind )
keycode 88 - KP_Down ( fast forward )
keycode 89 - KP_Next ( play/pause )
keycode 104 - KP_Enter ( bookmark audio )
keycode 83 - KP_Left ( split audio )
keycode 84 - KP_Begin ( join & play audio )

5. setup speech-dispatcher

sudo apt -y install speech-dispatcher

6. setup scripts:

rewind, terminal:

leafpad ~/Music/rewind.bash

paste code:

#!/bin/bash

audtool playback-seek-relative -10
spd-say -t female2 p

save & close text editor, make it executable:

chmod +x ~/Music/rewind.bash
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fast forward, terminal:

leafpad ~/Music/fforward.bash

paste code:

#!/bin/bash

audtool playback-seek-relative 10
spd-say -t female2 n

save & close text editor, make it executable:

chmod +x ~/Music/fforward.bash

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play/pause, terminal:

leafpad ~/Music/play_pause.bash

paste code:

#!/bin/bash

function play_pause() {
    status=$(audtool playback-status)
    if grep 'paused\|stopped' <<< $status ; then
        audtool playback-play
    else
        audtool playback-pause
    fi
}

play_pause
spd-say -t female2 s

save & close text editor, make it executable:

chmod +x ~/Music/play_pause.bash
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bookmark audio, terminal:

leafpad ~/Music/mark_in_out.bash

paste code:

#!/bin/bash

function mark_audio() {
    out_loc=$(echo ~/Music/marks.txt)
    status=$(audtool playback-status)
    current_song_pos=$(audtool --current-song-output-length-seconds)
    minutes=$((current_song_pos / 60))
    if [[ "$minutes" -lt 10 ]]; then
        minutes=$(printf "%02d" $minutes)
    fi
    seconds=$((current_song_pos % 60))
    if [[ "$seconds" -lt 10 ]]; then
        seconds=$(printf "%02d" $seconds)
    fi
    write_marker=$(echo $minutes":"$seconds)
    if [[ -f "$out_loc" ]]; then
        echo -n " $write_marker" >> $out_loc
    else
        echo -n "$write_marker" >> $out_loc
    fi
}

mark_audio
spd-say -t female2 m

save & close text editor, make it executable:

chmod +x ~/Music/mark_in_out.bash
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7. make audio clips:

install dependencies:

sudo apt -y install ffmpeg

split audio & backup marks.txt before its deletion, terminal:

leafpad ~/Music/split_audio.bash

paste code:

#!/bin/bash

function check_out_loc() {
  w_dir="$(pwd)/clips"
  echo $w_dir
  if [ -d "$w_dir" ]; then
    # re-creatates subdir clips in the current folder
    rm -rf $w_dir
    mkdir "$(pwd)/clips"
    echo direcotry re-created
  else
    mkdir "$(pwd)/clips"
    echo direcotry created
  fi
}

function cut_audio() {
  readarray -t mp3_files < <(find ./ -maxdepth 1 -type f -regex '.*\.\(mp3\|flac\)$' | sed "s/.*\///")
  if [ ${#mp3_files[@]} -eq 1 ]; then
    j=0
    for i in "$@"; do
      ((j++))
      if [ $((j%2)) -eq 0 ]; then
        end_time=$i
        MPHR=60
        IFS=':' read -ra start_array <<< "$start_time"
        IFS=':' read -ra end_array <<< "$end_time"
        len_start_min=${#start_array[0]}
        len_start_sec=$(( $len_start_min + 1 ))
        len_end_min=${#end_array[0]}
        len_end_sec=$(( $len_end_min + 1 ))
        start_time_sec=$(( ( 10#${start_time:0:$len_start_min} ) * MPHR + 10#${start_time:$len_start_sec} ))
        duration=$(( ( 10#${end_time:0:$len_end_min} - 10#${start_time:0:$len_start_min} ) * MPHR + 10#${end_time:$len_end_sec} - 10#${start_time:$len_start_sec} ))
        file_name=$(basename "${mp3_files[0]}" | cut -d. -f1)
        file_extension=$(basename "${mp3_files[0]}" | cut -d. -f2)
        escape=("[" "]" "~" "!" "{" "}" "(" ")" "$" "@" "<" ">" ":" ";" "," '`' "%" "+" "=" '"' "|" "?" '*' "&" " " "'")
        for e in "${escape[@]}"
        do
          file_name=${file_name//[$e]/\\$e}
        done
        file_name=${file_name//"\\'"/"'\"\'\"'"}
        w_dir="$(pwd)/clips/"
        out_name=$w_dir$(echo $file_name"_"$start_time"-"$end_time"."$file_extension | sed s/:/_/g)
        # removes metadata
        cmd=$(echo ffmpeg -y -ss $start_time_sec -t $duration -i "$file_name"."$file_extension" -map_metadata -1 -c:a copy "$out_name")
        # no metadata removal
        # cmd=$(echo ffmpeg -y -ss $start_time_sec -t $duration -i "$file_name"."$file_extension" -c:a copy "$out_name")
        # echo $cmd
        bash -c "$cmd"
      else
        start_time=$i
      fi
    done
    # backup marks.txt file
    if [ -f "$(pwd)/marks.txt" ]; then
      marks_out_loc=$(echo $(pwd)/marks_$(date +%s).txt)
      cp "$(pwd)/marks.txt" "$marks_out_loc"
      echo -n " $file_name"."$file_extension" >> $marks_out_loc
      echo marks.txt backup done
      rm marks.txt
    fi
  else
    echo "error, only 1 mp3/flac file allowed in the current working directory"
  fi
}

check_out_loc
cut_audio $(cat ~/Music/marks.txt)
spd-say -t female2 "split audio"

save & close text editor, make it executable:

chmod +x ~/Music/split_audio.bash

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8. join & listen:

join clips & play, terminal:

leafpad ~/Music/join_play.bash

paste code:

#!/bin/bash

function check_out_loc() {
  w_dir="$(pwd)/joins"
  echo $w_dir
  if [ -d "$w_dir" ]; then
    echo direcotry exists
  else
    mkdir "$(pwd)/joins"
    echo direcotry created
  fi
}

function join_clips() {
    readarray -t files < <(find ./clips -maxdepth 1 -type f -regex '.*\.\(mp3\|flac\)$' | sed "s/.*\///")
    file_extension=$(basename "${files[0]}" | cut -d. -f2)
    out_loc=$(echo joins/$(date +%s).$file_extension)
    cat ./clips/*.* > ./"$out_loc"
    audacious "$(echo $(pwd)/$out_loc)"
}

check_out_loc
join_clips
spd-say -t female2 "join & play"

save & close text editor, make it executable:

chmod +x ~/Music/join_play.bash
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9. setup keyboard keybindings:

create & edit config file:

leafpad ~/.xbindkeysrc

paste code:

"/home/$(whoami)/Music/rewind.bash"
c:87

"/home/$(whoami)/Music/fforward.bash"
c:88

"/home/$(whoami)/Music/play_pause.bash"
c:89

"/home/$(whoami)/Music/mark_in_out.bash"
c:104

"/home/$(whoami)/Music/split_audio.bash"
c:83

"/home/$(whoami)/Music/join_play.bash"
c:84

save & close text editor, exectue following commands in terminal:

xbindkeys
killall xbindkeys && xbindkeys

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10. power manager settings:

xfce power manager, terminal:

xfce4-power-manager-settings

Laptop lid - On battery / Plugged in - Switch off display
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further optimization is up to the user imagination