======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '206'
                                          'artist'  'Phil Green'
                                     'text_people'  ''
                                         'release'  'HMV BD-5041'
                                           'title'  "Nobody's Sweetheart (Ballyhooligans)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-3', 'q-busy-2', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-2', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['trance', 'american', 'electronic', 'hard trance', 'progressive trance']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '144.028'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'HMV BD-5041'
'TBPM' (BPM (beats per minute))                     '144.028'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1936'
'TIT2' (Title/songname/content description)         "Nobody's Sweetheart (Ballyhooligans)"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Phil Green'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['trance', 'american', 'electronic', 'hard trance', 'progressive trance']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.40 dB'
'TXXX:replaygain_track_peak'                        '0.543869'

========================== row from database ==========================
                                              'id'  1502963
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1936/Phil Green - Nobody_s Sweetheart (Ballyhooligans) 27-2-1936.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  206
                                           'genre'  prerock-unsorted
                                        'filesize'  4122418
                                           'mtime'  1621697996
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1936 Nobody_s 27 2 1936 prerock unsorted
                                      'tag_artist'  Phil Green
                                     'tag_release'  HMV BD-5041
                                       'tag_title'  Nobody's Sweetheart (Ballyhooligans)
                                             'bpm'  144.028
                                    'search_title'  'ballyhooligans':5,6 'nobody':1 'nobodys':3 's':2 'sweetheart':4
                                   'search_artist'  'green':2 'phil':1
                                  'search_release'  '5041':3 'bd':2 'bd5041':4 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1936':6 '2':10 '27':9 'country':4 'exotica':2 'jazz':1 'nobody':7 'oldies':3 'prerock':11 's':8 'unsorted':12
                                    'search_combo'  '00oldiepop':17 '1936':18 '2':22 '27':21 '5041':11C 'ballyhooligans':5A,6A 'bd':10C 'bd5041':12C 'country':16 'exotica':14 'green':8B 'hmv':9C 'jazz':13 'nobody':1A,19 'nobodys':3A 'oldies':15 'phil':7B 'prerock':23 's':2A,20 'sweetheart':4A 'unsorted':24
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['trance', 'american', 'electronic', 'hard trance', 'progressive trance']
                                        'tag_date'  1936
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621697995.8921478  (2021-05-22 17:39:55)
                             'size'  4122418