======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '181'
                                          'artist'  'Frank Sinatra'
                                     'text_people'  ''
                                         'release'  'Capitol 3102'
                                           'title'  "Learnin' The Blues"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['easy listening', 'jazz', 'vocal jazz', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '013'
                                      'tracktotal'  ''
                                            'date'  '1955'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '128.008'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Capitol 3102'
'TBPM' (BPM (beats per minute))                     '128.008'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1955'
'TIT2' (Title/songname/content description)         "Learnin' The Blues"
'TKEY' (Initial key)                                '11A'
'TLEN' (Length)                                     '181733'
'TPE1' (Lead performer(s)/Soloist(s))               'Frank Sinatra'
'TPUB' (Publisher)                                  'Capitol'
'TRCK' (Track number/Position in set)               '013'
'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'                                   ['easy listening', 'jazz', 'vocal jazz', 'oldies', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.41 dB'
'TXXX:replaygain_track_peak'                        '0.603006'

========================== row from database ==========================
                                              'id'  1518815
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1955/1955-013 - Frank Sinatra - Learnin_ The Blues.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  181
                                           'genre'  prerock-swing
                                        'filesize'  7290579
                                           'mtime'  1620562513
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1955 1955 013 Learnin_ prerock swing
                                      'tag_artist'  Frank Sinatra
                                     'tag_release'  Capitol 3102
                                       'tag_title'  Learnin' The Blues
                                             'bpm'  128.008
                                    'search_title'  'blues':4 'learnin':1,2 'the':3
                                   'search_artist'  'frank':1 'sinatra':2
                                  'search_release'  '3102':2 'capitol':1
                                     'search_rest'  '00oldiepop':5 '1955':6 'country':4 'exotica':2 'jazz':1 'learnin':7 'oldies':3 'prerock':8 'swing':9
                                    'search_combo'  '00oldiepop':13 '1955':14 '3102':8C 'blues':4A 'capitol':7C 'country':12 'exotica':10 'frank':5B 'jazz':9 'learnin':1A,2A,15 'oldies':11 'prerock':16 'sinatra':6B 'swing':17 'the':3A
                                    'tag_tracknum'  13
                                      'num_images'  1
                                             'key'  11A
                                           '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-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['easy listening', 'jazz', 'vocal jazz', 'oldies', 'swing']
                                        'tag_date'  1955
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562512.8557556  (2021-05-09 14:15:12)
                             'size'  7290579