======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '143'
                                          'artist'  'Elvis Presley'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I'll Never Let You Go (Little Darlin')"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll'
                                             'bpm'  '132.012'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '132.012'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rocknroll'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "I'll Never Let You Go (Little Darlin')"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Elvis Presley'
'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'                                   ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+2.98 dB'
'TXXX:replaygain_track_peak'                        '0.544872'

========================== row from database ==========================
                                              'id'  1499966
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/Elvis Presley - I_ll Never Let You Go (Little Darlin_) 1956.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  143
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  2875186
                                           'mtime'  1622659466
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 I_ll Darlin_) 1956 rock pop early rocknroll
                                      'tag_artist'  Elvis Presley
                                     'tag_release'  None
                                       'tag_title'  I'll Never Let You Go (Little Darlin')
                                             'bpm'  132.012
                                    'search_title'  'darlin':10,11 'go':7 'i':1 'ill':3 'let':5 'little':8,9 'll':2 'never':4 'you':6
                                   'search_artist'  'elvis':1 'presley':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 'country':4 'darlin':9,10 'early':13 'exotica':2 'i':7 'jazz':1 'll':8 'oldies':3 'pop':12 'rock':11 'rocknroll':14
                                    'search_combo'  '00oldiepop':18 '1956':19 'country':17 'darlin':10A,11A,22,23 'early':26 'elvis':12B 'exotica':15 'go':7A 'i':1A,20 'ill':3A 'jazz':14 'let':5A 'little':8A,9A 'll':2A,21 'never':4A 'oldies':16 'pop':25 'presley':13B 'rock':24 'rocknroll':27 'you':6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           '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-3', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659466.4534907  (2021-06-02 20:44:26)
                             'size'  2875186