======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '181'
                                          'artist'  'Louis Davids'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Cakewalk (+ Rika 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-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', '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'  '1906'
                                        'comments'  ''
                                           'genre'  'loc-eur-netherlands'
                                             'bpm'  '87.032'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '87.032'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-netherlands'
'TDRC' (Recording time)                             '1906'
'TIT2' (Title/songname/content description)         'Cakewalk (+ Rika Davids)'
'TKEY' (Initial key)                                '3A'
'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'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.71 dB'
'TXXX:replaygain_track_peak'                        '0.551048'

========================== row from database ==========================
                                              'id'  1451197
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1906/Louis Davids - Cakewalk (+ Rika Davids) 1906.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  181
                                           'genre'  loc-eur-netherlands
                                        'filesize'  3635006
                                           'mtime'  1621627051
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1906 1906 loc eur netherlands
                                      'tag_artist'  Louis Davids
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Cakewalk (+ Rika Davids)
                                             'bpm'  87.032
                                    'search_title'  'cakewalk':1 'davids':3,4 'rika':2
                                   'search_artist'  'davids':2 'louis':1
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1906':6 'country':4 'eur':8 'exotica':2 'jazz':1 'loc':7 'netherlands':9 'oldies':3
                                    'search_combo'  '00oldiepop':16 '1906':17 'album':8C 'cakewalk':1A 'country':15 'davids':3A,4A,6B 'eur':19 'exotica':13 'jazz':12 'loc':18 'louis':5B 'netherlands':20 'non':7C 'nonalbum':9C 'oldies':14 'rika':2A 'tracks':10C,11C
                                    'tag_tracknum'  None
                                      '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-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['kleinkunst', 'nederlandstalig', 'nederlands', 'the netherlands', 'dutch']
                                        'tag_date'  1906
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627051.2552807  (2021-05-21 21:57:31)
                             'size'  3635006