======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '217'
                                          'artist'  'Sibyl Sanderson Fagan'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol  3723'
                                           'title'  'Melody In F (Rubinstein)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['10s', '20s', 'all', 'whistling', 'retro']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1919'
                                        'comments'  ''
                                           'genre'  'prerock-instrumental;mi-whistling'
                                             'bpm'  '145.895'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison Blue Amberol  3723'
'TBPM' (BPM (beats per minute))                     '145.895'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-instrumental', 'mi-whistling']
'TDRC' (Recording time)                             '1919'
'TIT2' (Title/songname/content description)         'Melody In F (Rubinstein)'
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Sibyl Sanderson Fagan'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['10s', '20s', 'all', 'whistling', 'retro']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.38 dB'
'TXXX:replaygain_track_peak'                        '0.327708'

========================== row from database ==========================
                                              'id'  1435713
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1919/Sibyl Sanderson Fagan (whistling) - Melody In F (Rubinstein) -1-1919.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  217
                                           'genre'  prerock-instrumental;mi-whistling
                                        'filesize'  4359986
                                           'mtime'  1620527939
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1919 (whistling) 1 1919 prerock instrumental;mi whistling
                                      'tag_artist'  Sibyl Sanderson Fagan
                                     'tag_release'  Edison Blue Amberol  3723
                                       'tag_title'  Melody In F (Rubinstein)
                                             'bpm'  145.895
                                    'search_title'  'f':3 'in':2 'melody':1 'rubinstein':4,5
                                   'search_artist'  'fagan':3 'sanderson':2 'sibyl':1
                                  'search_release'  '3723':4 'amberol':3 'blue':2 'edison':1
                                     'search_rest'  '00oldiepop':5 '1':9 '1919':6 'country':4 'exotica':2 'instrumental':11,13 'jazz':1 'mi':12,14 'oldies':3 'prerock':10 'whistling':7,8
                                    'search_combo'  '00oldiepop':17 '1':21 '1919':18 '3723':12C 'amberol':11C 'blue':10C 'country':16 'edison':9C 'exotica':14 'f':3A 'fagan':8B 'in':2A 'instrumental':23,25 'jazz':13 'melody':1A 'mi':24,26 'oldies':15 'prerock':22 'rubinstein':4A,5A 'sanderson':7B 'sibyl':6B 'whistling':19,20
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', '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-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['10s', '20s', 'all', 'whistling', 'retro']
                                        'tag_date'  1919
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527938.9928093  (2021-05-09 04:38:58)
                             'size'  4359986