======================== unified (from filesystem) ========================
                                         'bitrate'  '217.963'
                                        'duration'  '83'
                                          'artist'  'Don Voegeli'
                                     'text_people'  ''
                                         'release'  'Oscillations'
                                           'title'  'March for April'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-2', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['synth', 'avant garde', 'library music', 'experimental', 'easy listening']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'soundtrack-library'
                                             'bpm'  '133.2'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Oscillations'
'TBPM' (BPM (beats per minute))                     '133.2'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-library'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'March for April'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Don Voegeli'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['synth', 'avant garde', 'library music', 'experimental', 'easy listening']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'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'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.34 dB'
'TXXX:replaygain_track_peak'                        '0.595751'

========================== row from database ==========================
                                              'id'  1367554
                                            'path'  /data/Music/Bulk/0soundtrack/Don Voegeli - Oscillations Vol 1-4 (1974)/March for April.mp3
                                         'working'  None
                                         'bitrate'  217
                                    'duration_sec'  83
                                           'genre'  soundtrack-library
                                        'filesize'  2264235
                                           'mtime'  1622756602
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Vol 1 4 (1974) soundtrack library
                                      'tag_artist'  Don Voegeli
                                     'tag_release'  Oscillations
                                       'tag_title'  March for April
                                             'bpm'  133.2
                                    'search_title'  'april':3 'for':2 'march':1
                                   'search_artist'  'don':1 'voegeli':2
                                  'search_release'  'oscillations':1
                                     'search_rest'  '0soundtrack':1 '1':3 '1974':5,6 '4':4 'library':8 'soundtrack':7 'vol':2
                                    'search_combo'  '0soundtrack':7 '1':9 '1974':11,12 '4':10 'april':3A 'don':4B 'for':2A 'library':14 'march':1A 'oscillations':6C 'soundtrack':13 'voegeli':5B 'vol':8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['synth', 'avant garde', 'library music', 'experimental', 'easy listening']
                                        'tag_date'  2000
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1622756601.550338  (2021-06-03 23:43:21)
                             'size'  2264235