======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '282'
                                          'artist'  'Jo Stafford'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Blue moon'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz vocal', 'jazz', 'female vocalists', '50s', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1950'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-vocal'
                                             'bpm'  '136.736'
                                             'key'  '3B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '136.736'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         'Blue moon'
'TKEY' (Initial key)                                '3B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jo Stafford'
'TXXX:Mp3gain_minmax'                               '065,207'
'TXXX:Mp3gain_undo'                                 '+003,+003,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz vocal', 'jazz', 'female vocalists', '50s', 'oldies']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+1.07 dB'
'TXXX:replaygain_track_peak'                        '0.539502'

========================== row from database ==========================
                                              'id'  770254
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/stafford, jo (us)/Jo Stafford - Blue moon.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  282
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  9046173
                                           'mtime'  1620538034
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country stafford, jo (us) prerock jb jazz vocal
                                      'tag_artist'  Jo Stafford
                                     'tag_release'  None
                                       'tag_title'  Blue moon
                                             'bpm'  136.736
                                    'search_title'  'blue':1 'moon':2
                                   'search_artist'  'jo':1 'stafford':2
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'jb':11 'jo':7 'oldies':3 'prerock':10 'stafford':5,6 'us':8,9 'vocal':12
                                    'search_combo'  'blue':1A 'country':8 'exotica':6 'jazz':5 'jb':15 'jo':3B,11 'moon':2A 'oldies':7 'prerock':14 'stafford':4B,9,10 'us':12,13 'vocal':16
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['jazz vocal', 'jazz', 'female vocalists', '50s', 'oldies']
                                        'tag_date'  1950
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620538034.385529  (2021-05-09 07:27:14)
                             'size'  9046173