======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '203'
                                          'artist'  'Marais and Miranda'
                                     'text_people'  ''
                                         'release'  'A European Folk Song Festival'
                                           'title'  'The Golden Days of Youth'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-OLDST-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['nature', 'science', 'folk', 'eductional', 'educational']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '12'
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk;loc-eur'
                                             'bpm'  '139.9'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'A European Folk Song Festival'
'TBPM' (BPM (beats per minute))                     '139.9'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-folk', 'loc-eur']
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'The Golden Days of Youth'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Marais and Miranda'
'TRCK' (Track number/Position in set)               '10/12'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['nature', 'science', 'folk', 'eductional', 'educational']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.43 dB'
'TXXX:replaygain_track_peak'                        '0.601907'

========================== row from database ==========================
                                              'id'  1374679
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Marais and Miranda/a european folk song festival/10 the golden days of youth.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  203
                                           'genre'  ifs-songwriter-folk;loc-eur
                                        'filesize'  4062819
                                           'mtime'  1621630292
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos european folk song festival 10 the golden days youth ifs songwriter folk;loc eur
                                      'tag_artist'  Marais and Miranda
                                     'tag_release'  A European Folk Song Festival
                                       'tag_title'  The Golden Days of Youth
                                             'bpm'  139.9
                                    'search_title'  'days':3 'golden':2 'of':4 'the':1 'youth':5
                                   'search_artist'  'and':2 'marais':1 'miranda':3
                                  'search_release'  'a':1 'european':2 'festival':5 'folk':3 'song':4
                                     'search_rest'  '00singer':1 'days':10 'eos':3 'eur':17 'european':4 'festival':7 'folk':5,13,15 'golden':9 'ifs':12 'loc':14,16 'song':6 'songwriter':2 'the':8 'youth':11
                                    'search_combo'  '00singer':14 'a':9C 'and':7B 'days':3A,23 'eos':16 'eur':30 'european':10C,17 'festival':13C,20 'folk':11C,18,26,28 'golden':2A,22 'ifs':25 'loc':27,29 'marais':6B 'miranda':8B 'of':4A 'song':12C,19 'songwriter':15 'the':1A,21 'youth':5A,24
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['nature', 'science', 'folk', 'eductional', 'educational']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621630292.14404  (2021-05-21 22:51:32)
                             'size'  4062819