======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '334'
                                          'artist'  'Louis Davids'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Rooie Nel En Toffe Jan (deel 1 & 2) (+ Henriette Davids)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['kleinkunst', 'nederlandstalig', 'nederlands', 'the netherlands', 'dutch']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1916'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '84.175'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '84.175'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TDRC' (Recording time)                             '1916'
'TIT2' (Title/songname/content description)         'Rooie Nel En Toffe Jan (deel 1 & 2) (+ Henriette Davids)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Louis Davids'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['kleinkunst', 'nederlandstalig', 'nederlands', 'the netherlands', 'dutch']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.86 dB'
'TXXX:replaygain_track_peak'                        '0.473632'

========================== row from database ==========================
                                              'id'  1428533
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1916/Louis Davids - Rooie Nel En Toffe Jan (deel 1 & 2) (+ Henriette Davids) 1916.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  334
                                           'genre'  loc-eur-netherlands
                                        'filesize'  6690727
                                           'mtime'  1621627084
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1916 1916 loc eur netherlands
                                      'tag_artist'  Louis Davids
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Rooie Nel En Toffe Jan (deel 1 & 2) (+ Henriette Davids)
                                             'bpm'  84.175
                                    'search_title'  '1':8 '2':9,10 'davids':12,13 'deel':6,7 'en':3 'henriette':11 'jan':5 'nel':2 'rooie':1 'toffe':4
                                   'search_artist'  'davids':2 'louis':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1916':6 'country':4 'eur':8 'exotica':2 'jazz':1 'loc':7 'netherlands':9 'oldies':3
                                    'search_combo'  '00oldiepop':25 '1':8A '1916':26 '2':9A,10A 'album':17C 'country':24 'davids':12A,13A,15B 'deel':6A,7A 'en':3A 'eur':28 'exotica':22 'henriette':11A 'jan':5A 'jazz':21 'loc':27 'louis':14B 'nel':2A 'netherlands':29 'non':16C 'nonalbum':18C 'oldies':23 'rooie':1A 'toffe':4A 'tracks':19C,20C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['kleinkunst', 'nederlandstalig', 'nederlands', 'the netherlands', 'dutch']
                                        'tag_date'  1916
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627084.4414756  (2021-05-21 21:58:04)
                             'size'  6690727