======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '145'
                                          'artist'  'Hank Williams'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I'll Never Get Out Of This World Alive"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-3', '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwriter', 'americana', 'folk', 'classic country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1952'
                                        'comments'  ''
                                           'genre'  'prerock-country'
                                             'bpm'  '117.740'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '117.740'
'TCON' (Content type, a.k.a. Genre)                 'prerock-country'
'TDRC' (Recording time)                             '1952'
'TIT2' (Title/songname/content description)         "I'll Never Get Out Of This World Alive"
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'Hank Williams'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'singer songwriter', 'americana', 'folk', 'classic country']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.06 dB'
'TXXX:replaygain_track_peak'                        '0.665619'

========================== row from database ==========================
                                              'id'  1504984
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1952/Hank Williams - I_ll Never Get Out Of This World Alive 13-6-1952.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  145
                                           'genre'  prerock-country
                                        'filesize'  2916146
                                           'mtime'  1621627768
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1952 I_ll 13 6 1952 prerock country
                                      'tag_artist'  Hank Williams
                                     'tag_release'  None
                                       'tag_title'  I'll Never Get Out Of This World Alive
                                             'bpm'  117.74
                                    'search_title'  'alive':10 'get':5 'i':1 'ill':3 'll':2 'never':4 'of':7 'out':6 'this':8 'world':9
                                   'search_artist'  'hank':1 'williams':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1952':6 '6':9 'country':4 'exotica':2 'i':7 'jazz':1 'll':8 'oldies':3 'prerock':10
                                    'search_combo'  '00oldiepop':17 '1952':18 '6':21 'alive':10A 'country':16 'exotica':14 'get':5A 'hank':11B 'i':1A,19 'ill':3A 'jazz':13 'll':2A,20 'never':4A 'of':7A 'oldies':15 'out':6A 'prerock':22 'this':8A 'williams':12B 'world':9A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['country', 'singer songwriter', 'americana', 'folk', 'classic country']
                                        'tag_date'  1952
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627767.5320377  (2021-05-21 22:09:27)
                             'size'  2916146