======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '169'
                                          'artist'  'Jo Stafford'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Teach me tonight'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', '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;set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '128.008'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '128.008'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-jazz-vocal', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1950'
'TIT2' (Title/songname/content description)         'Teach me tonight'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jo Stafford'
'TXXX:Mp3gain_minmax'                               '082,206'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'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'                        '+1.53 dB'
'TXXX:replaygain_track_peak'                        '0.488800'

========================== row from database ==========================
                                              'id'  770003
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/stafford, jo (us)/Jo Stafford - Teach me tonight.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  169
                                           'genre'  prerock-jb-jazz-vocal;set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  5440036
                                           'mtime'  1620538059
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country stafford, jo (us) prerock jb jazz vocal;set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Jo Stafford
                                     'tag_release'  None
                                       'tag_title'  Teach me tonight
                                             'bpm'  128.008
                                    'search_title'  'me':2 'teach':1 'tonight':3
                                   'search_artist'  'jo':1 'stafford':2
                                  'search_release'  
                                     'search_rest'  'country':4 'exotica':2 'jazz':1 'jb':11 'jo':7 'mor':21 'oldies':3 'pl':16 'prerock':10 'set':13,15,18,20 'shirleyspinoza':17,19 'stafford':5,6 'us':8,9 'vocal':12,14
                                    'search_combo'  'country':9 'exotica':7 'jazz':6 'jb':16 'jo':4B,12 'me':2A 'mor':26 'oldies':8 'pl':21 'prerock':15 'set':18,20,23,25 'shirleyspinoza':22,24 'stafford':5B,10,11 'teach':1A 'tonight':3A 'us':13,14 'vocal':17,19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           '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-2', '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'  1620538058.9281285  (2021-05-09 07:27:38)
                             'size'  5440036