======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '187'
                                          'artist'  'Lou Preager'
                                     'text_people'  ''
                                         'release'  'Columbia FB  3207'
                                           'title'  'Who Could Love You Like Me (vocal - Rita Williams)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1946'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '140.433'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Columbia FB  3207'
'TBPM' (BPM (beats per minute))                     '140.433'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1946'
'TIT2' (Title/songname/content description)         'Who Could Love You Like Me (vocal - Rita Williams)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Lou Preager'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.31 dB'
'TXXX:replaygain_track_peak'                        '0.457564'

========================== row from database ==========================
                                              'id'  1444828
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1946/Lou Preager - Who Could Love You Like Me (vocal - Rita Williams) 3-3-1946.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  187
                                           'genre'  prerock-swing
                                        'filesize'  3751623
                                           'mtime'  1620562070
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1946 1946 prerock swing
                                      'tag_artist'  Lou Preager
                                     'tag_release'  Columbia FB  3207
                                       'tag_title'  Who Could Love You Like Me (vocal - Rita Williams)
                                             'bpm'  140.433
                                    'search_title'  'could':2 'like':5 'love':3 'me':6 'rita':9 'vocal':7,8 'who':1 'williams':10,11 'you':4
                                   'search_artist'  'lou':1 'preager':2
                                  'search_release'  '3207':3 'columbia':1 'fb':2
                                     'search_rest'  '00oldiepop':5 '1946':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':7 'swing':8
                                    'search_combo'  '00oldiepop':21 '1946':22 '3207':16C 'columbia':14C 'could':2A 'country':20 'exotica':18 'fb':15C 'jazz':17 'like':5A 'lou':12B 'love':3A 'me':6A 'oldies':19 'preager':13B 'prerock':23 'rita':9A 'swing':24 'vocal':7A,8A 'who':1A 'williams':10A,11A 'you':4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', '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-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1946
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620562069.7827864  (2021-05-09 14:07:49)
                             'size'  3751623