======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '221'
                                          'artist'  'Jo Stafford'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I'll walk alone 1958"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', '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'  '133.756'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '133.756'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-vocal'
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         "I'll walk alone 1958"
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jo Stafford'
'TXXX:Mp3gain_minmax'                               '103,206'
'TXXX:Mp3gain_undo'                                 '+004,+004,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'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.01 dB'
'TXXX:replaygain_track_peak'                        '0.392735'

========================== row from database ==========================
                                              'id'  1505892
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/stafford, jo (us)/Jo Stafford - I_ll walk alone 1958.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  221
                                           'genre'  prerock-jb-jazz-vocal
                                        'filesize'  7105193
                                           'mtime'  1620538040
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country stafford, jo (us) I_ll prerock jb jazz vocal
                                      'tag_artist'  Jo Stafford
                                     'tag_release'  None
                                       'tag_title'  I'll walk alone 1958
                                             'bpm'  133.756
                                    'search_title'  '1958':6 'alone':5 'i':1 'ill':3 'll':2 'walk':4
                                   'search_artist'  'jo':1 'stafford':2
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'i':10 'jazz':1 'jb':13 'jo':7 'll':11 'oldies':3 'prerock':12 'stafford':5,6 'us':8,9 'vocal':14
                                    'search_combo'  '1958':6A 'alone':5A 'country':12 'exotica':10 'i':1A,18 'ill':3A 'jazz':9 'jb':21 'jo':7B,15 'll':2A,19 'oldies':11 'prerock':20 'stafford':8B,13,14 'us':16,17 'vocal':22 'walk':4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['jazz vocal', 'jazz', 'female vocalists', '50s', 'oldies']
                                        'tag_date'  1950
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620538040.1860363  (2021-05-09 07:27:20)
                             'size'  7105193