======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '260'
                                          'artist'  'Estampie'
                                     'text_people'  ''
                                         'release'  'Signum'
                                           'title'  'Bona Condit'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-OLDST-1', 'Q-LOCALNESS-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['medieval', 'mittelalter', 'medieval folk', 'german', 'ethereal', 'folk']"
                                     'discogstags'  "['classical', 'medieval']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  '16'
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'ifs-folk-classical'
                                             'bpm'  '142.9'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Signum'
'TBPM' (BPM (beats per minute))                     '142.9'
'TCON' (Content type, a.k.a. Genre)                 'ifs-folk-classical'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Bona Condit'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Estampie'
'TRCK' (Track number/Position in set)               '15/16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['classical', 'medieval']
'TXXX:lastfmtags'                                   ['medieval', 'mittelalter', 'medieval folk', 'german', 'ethereal', 'folk']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+12.45 dB'
'TXXX:replaygain_track_peak'                        '0.102335'

========================== row from database ==========================
                                              'id'  297654
                                            'path'  /data/Music/Bulk/00instruments-classical/Estampie/2004 - Signum/15. Bona Condit.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  260
                                           'genre'  ifs-folk-classical
                                        'filesize'  10433451
                                           'mtime'  1622757766
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical 2004 15. ifs folk classical
                                      'tag_artist'  Estampie
                                     'tag_release'  Signum
                                       'tag_title'  Bona Condit
                                             'bpm'  142.9
                                    'search_title'  'bona':1 'condit':2
                                   'search_artist'  'estampie':1
                                  'search_release'  'signum':1
                                     'search_rest'  '00instruments':1 '15':4,5 '2004':3 'classical':2 'folk':7 'ifs':6
                                    'search_combo'  '00instruments':5 '15':8,9 '2004':7 'bona':1A 'classical':6 'condit':2A 'estampie':3B 'folk':11 'ifs':10 'signum':4C
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['medieval', 'mittelalter', 'medieval folk', 'german', 'ethereal', 'folk']
                                        'tag_date'  2004
                                     'discogstags'  ['classical', 'medieval']

============================== file details ==============================
                                           'mtime'  1622757766.4936368  (2021-06-04 00:02:46)
                             'size'  10433451