======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '590'
                                          'artist'  'Maksim Mrvica'
                                     'text_people'  ''
                                         'release'  'Variations Part I&II'
                                           'title'  'Bohemian Rhapsody'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'q-syn-1', 'Q-PLAY-3', "
 "'q-bass-2', 'q-busy-2', 'q-grit-2', 'Q-OLDST-1', 'Q-PIANO-4', 'q-chart-3', "
 "'q-drums-1', 'q-other-3', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['piano', 'instrumental', 'classical', 'neoclassic', 'new age']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '139.466'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Variations Part I&II'
'TBPM' (BPM (beats per minute))                     '139.466'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Bohemian Rhapsody'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Maksim Mrvica'
'TRCK' (Track number/Position in set)               '9'
'TXXX:Q-HAP'                                        '2'
'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'                                   ['piano', 'instrumental', 'classical', 'neoclassic', 'new age']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.08 dB'
'TXXX:replaygain_track_peak'                        '0.745855'

========================== row from database ==========================
                                              'id'  180241
                                            'path'  /data/Music/Bulk/00instruments-classical/Unsorted/Maksim Mrvica__Variations Part I&II__09 - Bohemian Rhapsody.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  590
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  9455431
                                           'mtime'  1637329808
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical Unsorted Mrvica__Variations I&II__09 prerock classical or classical instruments
                                      'tag_artist'  Maksim Mrvica
                                     'tag_release'  Variations Part I&II
                                       'tag_title'  Bohemian Rhapsody
                                             'bpm'  139.466
                                    'search_title'  'bohemian':1 'rhapsody':2
                                   'search_artist'  'maksim':1 'mrvica':2
                                  'search_release'  'i':3 'ii':4 'iii':5 'part':2 'variations':1
                                     'search_rest'  '00instruments':1 '09':8,10 'classical':2 'i':6 'ii':7 'iii':9 'instruments':13 'mrvica':4 'or':12 'prerock':11 'unsorted':3 'variations':5
                                    'search_combo'  '00instruments':10 '09':17,19 'bohemian':1A 'classical':11 'i':7C,15 'ii':8C,16 'iii':9C,18 'instruments':22 'maksim':3B 'mrvica':4B,13 'or':21 'part':6C 'prerock':20 'rhapsody':2A 'unsorted':12 'variations':5C,14
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  6A
                                           '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-1', 'q-chart-3', 'q-other-3', 'Q-HAP-2', 'Q-PLAY-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['piano', 'instrumental', 'classical', 'neoclassic', 'new age']
                                        'tag_date'  2004
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329808.4616318  (2021-11-19 14:50:08)
                             'size'  9455431