======================== unified (from filesystem) ========================
                                         'bitrate'  '221.881'
                                        'duration'  '566'
                                          'artist'  'Nils Frahm'
                                     'text_people'  ''
                                         'release'  'Library Tapes / Nils Frahm'
                                           'title'  'Tonalogia'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-2', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'Q-PIANO-4', 'q-chart-3', 'q-drums-1', 'q-other-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['contemporary classical', 'instrumental', 'piano', 'modern classical', "
 "'ambient']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '141.216'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Library Tapes / Nils Frahm'
'TBPM' (BPM (beats per minute))                     '141.216'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2008'
'TIT2' (Title/songname/content description)         'Tonalogia'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nils Frahm'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '4'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['contemporary classical',
 'instrumental',
 'piano',
 'modern classical',
 'ambient']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.09 dB'
'TXXX:replaygain_track_peak'                        '0.558205'

========================== row from database ==========================
                                              'id'  189862
                                            'path'  /data/Music/Bulk/00instruments-classical/Nils Frahm/2008 - Library Tapes & Nils Frahm/03 - Tonalogia.mp3
                                         'working'  None
                                         'bitrate'  221
                                    'duration_sec'  566
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  15715039
                                           'mtime'  1620574206
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 2008 & 03 prerock classical or classical instruments
                                      'tag_artist'  Nils Frahm
                                     'tag_release'  Library Tapes / Nils Frahm
                                       'tag_title'  Tonalogia
                                             'bpm'  141.216
                                    'search_title'  'tonalogia':1
                                   'search_artist'  'frahm':2 'nils':1
                                  'search_release'  'frahm':4 'library':1 'nils':3 'tapes':2
                                     'search_rest'  '00instruments':1 '2008':3 'classical':2 'instruments':6 'or':5 'prerock':4
                                    'search_combo'  '00instruments':8 '2008':10 'classical':9 'frahm':3B,7C 'instruments':13 'library':4C 'nils':2B,6C 'or':12 'prerock':11 'tapes':5C 'tonalogia':1A
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-4', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['contemporary classical', 'instrumental', 'piano', 'modern classical', 'ambient']
                                        'tag_date'  2008
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620574205.8112056  (2021-05-09 17:30:05)
                             'size'  15715039