======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '110'
                                          'artist'  'Trumpeteers'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'A String Of Trumpets'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['gospel', 'all', 'shady', 'thursday', 'shady grady']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '144.233'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '59-376 POS 64'
'COMM:ID3v1 Comment:XXX'                            '59-376 POS 64'
'TBPM' (BPM (beats per minute))                     '144.233'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         'A String Of Trumpets'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Trumpeteers'
'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'                                   ['gospel', 'all', 'shady', 'thursday', 'shady grady']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.57 dB'
'TXXX:replaygain_track_peak'                        '0.349921'

========================== row from database ==========================
                                              'id'  1429654
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1959/59-376 - Trumpeteers - A String Of Trumpets.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  110
                                           'genre'  prerock-unsorted
                                        'filesize'  4416700
                                           'mtime'  1621698422
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1959 59 376 prerock unsorted
                                      'tag_artist'  Trumpeteers
                                     'tag_release'  None
                                       'tag_title'  A String Of Trumpets
                                             'bpm'  144.233
                                    'search_title'  'a':1 'of':3 'string':2 'trumpets':4
                                   'search_artist'  'trumpeteers':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1959':6 '376':8 '59':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':10 '1959':11 '376':13 '59':12 'a':1A 'country':9 'exotica':7 'jazz':6 'of':3A 'oldies':8 'prerock':14 'string':2A 'trumpeteers':5B 'trumpets':4A 'unsorted':15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['gospel', 'all', 'shady', 'thursday', 'shady grady']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698421.5714934  (2021-05-22 17:47:01)
                             'size'  4416700