======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '452'
                                          'artist'  'Paul Whiteman'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Grand Canyon Suite 3 (On The Trail) (part 1)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'bandleaders', '20s', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1932'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '145.580'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.580'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1932'
'TIT2' (Title/songname/content description)         'Grand Canyon Suite 3 (On The Trail) (part 1)'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Whiteman'
'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'                                   ['big band', 'jazz', 'bandleaders', '20s', 'swing']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.26 dB'
'TXXX:replaygain_track_peak'                        '0.929021'

========================== row from database ==========================
                                              'id'  1447056
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1932/Paul Whiteman - Grand Canyon Suite 3 (On The Trail) (Part 1) 27-4-1932.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  452
                                           'genre'  prerock-swing
                                        'filesize'  9043794
                                           'mtime'  1620560073
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1932 (Part 27 4 1932 prerock swing
                                      'tag_artist'  Paul Whiteman
                                     'tag_release'  None
                                       'tag_title'  Grand Canyon Suite 3 (On The Trail) (part 1)
                                             'bpm'  145.58
                                    'search_title'  '1':12,13 '3':4 'canyon':2 'grand':1 'on':5,6 'part':10,11 'suite':3 'the':7 'trail':8,9
                                   'search_artist'  'paul':1 'whiteman':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1932':6 '27':9 '4':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'part':7,8 'prerock':11 'swing':12
                                    'search_combo'  '00oldiepop':20 '1':12A,13A '1932':21 '27':24 '3':4A '4':25 'canyon':2A 'country':19 'exotica':17 'grand':1A 'jazz':16 'oldies':18 'on':5A,6A 'part':10A,11A,22,23 'paul':14B 'prerock':26 'suite':3A 'swing':27 'the':7A 'trail':8A,9A 'whiteman':15B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'bandleaders', '20s', 'swing']
                                        'tag_date'  1932
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560072.6126726  (2021-05-09 13:34:32)
                             'size'  9043794