======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '170'
                                          'artist'  'Tommy Dorsey'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Be Careful It's My Heart (vocal - Frank Sinatra)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['big bands of the 30s and 40s', 'jazz', 'big band', '40s', 'swing', "
 "'trombone']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1942'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '125.393'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '125.393'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1942'
'TIT2' (Title/songname/content description)         "Be Careful It's My Heart (vocal - Frank Sinatra)"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tommy Dorsey'
'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'                                   ['big bands of the 30s and 40s', 'jazz', 'big band', '40s', 'swing', 'trombone']
'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'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.86 dB'
'TXXX:replaygain_track_peak'                        '0.637737'

========================== row from database ==========================
                                              'id'  1518204
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1942/Tommy Dorsey - Be Careful It_s My Heart (vocal - Frank Sinatra) 18-5-1942.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  170
                                           'genre'  prerock-band
                                        'filesize'  3405618
                                           'mtime'  1620561037
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1942 It_s 18 5 1942 prerock band
                                      'tag_artist'  Tommy Dorsey
                                     'tag_release'  None
                                       'tag_title'  Be Careful It's My Heart (vocal - Frank Sinatra)
                                             'bpm'  125.393
                                    'search_title'  'be':1 'careful':2 'frank':10 'heart':7 'it':3 'its':5 'my':6 's':4 'sinatra':11,12 'vocal':8,9
                                   'search_artist'  'dorsey':2 'tommy':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '18':9 '1942':6 '5':10 'band':12 'country':4 'exotica':2 'it':7 'jazz':1 'oldies':3 'prerock':11 's':8
                                    'search_combo'  '00oldiepop':19 '18':23 '1942':20 '5':24 'band':26 'be':1A 'careful':2A 'country':18 'dorsey':14B 'exotica':16 'frank':10A 'heart':7A 'it':3A,21 'its':5A 'jazz':15 'my':6A 'oldies':17 'prerock':25 's':4A,22 'sinatra':11A,12A 'tommy':13B 'vocal':8A,9A
                                    '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-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', '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'  ['big bands of the 30s and 40s', 'jazz', 'big band', '40s', 'swing', 'trombone']
                                        'tag_date'  1942
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561036.8092184  (2021-05-09 13:50:36)
                             'size'  3405618