======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '307'
                                          'artist'  'Nine Inch Nails'
                                     'text_people'  ''
                                         'release'  'Things Falling Apart'
                                           'title'  'Where Is Everybody? (Version B'
                                           'quals'  ("['Q-UNU-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HAP-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-4', 'q-grit-4', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['industrial metal', 'rock', 'industrial', 'nin', 'industrial rock']"
                                     'discogstags'  "['electronic', 'rock', 'idm', 'industrial']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'eid-ebm or industrial or darkwave'
                                             'bpm'  '143.721'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     'Things Falling Apart'
'TBPM' (BPM (beats per minute))                     '143.721'
'TCON' (Content type, a.k.a. Genre)                 'eid-ebm or industrial or darkwave'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Where Is Everybody? (Version B'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Nine Inch Nails'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['electronic', 'rock', 'idm', 'industrial']
'TXXX:lastfmtags'                                   ['industrial metal', 'rock', 'industrial', 'nin', 'industrial rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '4'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.31 dB'
'TXXX:replaygain_track_peak'                        '0.454977'

========================== row from database ==========================
                                              'id'  1393291
                                            'path'  /data/Music/Bulk/00dwimp/00ebm-industrial-darkwave-goth/Nine Inch Nails/Things Falling Apart/MBZ;#Nine Inch Nails;#Things Falling Apart;#07;#Where Is Everybody (version by Danny Lohner feat Telefon Tel Aviv).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  307
                                           'genre'  eid-ebm or industrial or darkwave
                                        'filesize'  7376248
                                           'mtime'  1620296040
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp 00ebm industrial darkwave goth MBZ;#Nine Nails;#Things Apart;#07;#Where (version by Danny Lohner feat Telefon Tel Aviv) eid ebm or industrial or darkwave
                                      'tag_artist'  Nine Inch Nails
                                     'tag_release'  Things Falling Apart
                                       'tag_title'  Where Is Everybody? (Version B
                                             'bpm'  143.721
                                    'search_title'  'b':6 'everybody':3 'is':2 'version':4,5 'where':1
                                   'search_artist'  'inch':2 'nails':3 'nine':1
                                  'search_release'  'apart':3 'falling':2 'things':1
                                     'search_rest'  '00dwimp':1 '00ebm':2 '07':15,18 'apart':14,17 'aviv':28,29 'by':22 'danny':23 'darkwave':4 'ebm':31 'eid':30 'feat':25 'goth':5 'industrial':3 'lohner':24 'mbz':6,8 'nails':10,12 'nine':7,9 'or':32 'tel':27 'telefon':26 'things':11,13 'version':20,21 'where':16,19
                                    'search_combo'  '00dwimp':13 '00ebm':14 '07':27,30 'apart':12C,26,29 'aviv':40,41 'b':6A 'by':34 'danny':35 'darkwave':16 'ebm':43 'eid':42 'everybody':3A 'falling':11C 'feat':37 'goth':17 'inch':8B 'industrial':15 'is':2A 'lohner':36 'mbz':18,20 'nails':9B,22,24 'nine':7B,19,21 'or':44 'tel':39 'telefon':38 'things':10C,23,25 'version':4A,5A,32,33 'where':1A,28,31
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-4', 'q-drums-4', 'q-syn-3', 'q-chart-4', 'q-other-1', 'Q-HAP-1', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['industrial metal', 'rock', 'industrial', 'nin', 'industrial rock']
                                        'tag_date'  2000
                                     'discogstags'  ['electronic', 'rock', 'idm', 'industrial']

============================== file details ==============================
                                           'mtime'  1620296039.7616472  (2021-05-06 12:13:59)
                             'size'  7376248