======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '196'
                                          'artist'  'Hoagy Carmichael'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Aba Daba Honeymoon (+ Cass Daley)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', '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'  "['jazz vocal', 'jazz', 'big band', 'swing', 'piano']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1951'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '86.217'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '86.217'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1951'
'TIT2' (Title/songname/content description)         'Aba Daba Honeymoon (+ Cass Daley)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Hoagy Carmichael'
'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:lastfmtags'                                   ['jazz vocal', 'jazz', 'big band', 'swing', 'piano']
'TXXX:q-bass'                                       '3'
'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'                        '+3.52 dB'
'TXXX:replaygain_track_peak'                        '0.577030'

========================== row from database ==========================
                                              'id'  1445147
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1951/Hoagy Carmichael - Aba Daba Honeymoon (+ Cass Daley) 31-1-1951.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  196
                                           'genre'  prerock-swing
                                        'filesize'  3923762
                                           'mtime'  1620562387
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1951 31 1 1951 prerock swing
                                      'tag_artist'  Hoagy Carmichael
                                     'tag_release'  None
                                       'tag_title'  Aba Daba Honeymoon (+ Cass Daley)
                                             'bpm'  86.217
                                    'search_title'  'aba':1 'cass':4 'daba':2 'daley':5,6 'honeymoon':3
                                   'search_artist'  'carmichael':2 'hoagy':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1':8 '1951':6 '31':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'swing':10
                                    'search_combo'  '00oldiepop':13 '1':16 '1951':14 '31':15 'aba':1A 'carmichael':8B 'cass':4A 'country':12 'daba':2A 'daley':5A,6A 'exotica':10 'hoagy':7B 'honeymoon':3A 'jazz':9 'oldies':11 'prerock':17 'swing':18
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           '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-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz vocal', 'jazz', 'big band', 'swing', 'piano']
                                        'tag_date'  1951
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562386.72819  (2021-05-09 14:13:06)
                             'size'  3923762