======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '198'
                                          'artist'  "Willie 'the Lion' Smith"
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Old Stamping-Ground'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'q-piano-2', 'Q-UNU-1', 'Q-JZFKS-2', "
 "'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'q-play-2', 'q-chart-1', 'q-drums-1', 'q-other-4', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'piano', 'jazz piano', 'stride', 'jazzpiano fathers']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '110.062'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '110.062'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1937'
'TIT2' (Title/songname/content description)         'Old Stamping-Ground'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               "Willie 'the Lion' Smith"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'piano', 'jazz piano', 'stride', 'jazzpiano fathers']
'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'                                      '2'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+3.17 dB'
'TXXX:replaygain_track_peak'                        '0.557087'

========================== row from database ==========================
                                              'id'  1512504
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Willie _ the Lion _ Smith - Old Stamping-Ground 14-7-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  198
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3968645
                                           'mtime'  1620526509
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 _ _ 14 7 1937 prerock jb jazz unsorted
                                      'tag_artist'  Willie 'the Lion' Smith
                                     'tag_release'  None
                                       'tag_title'  Old Stamping-Ground
                                             'bpm'  110.062
                                    'search_title'  'ground':3 'old':1 'stamping':2 'stampingground':4
                                   'search_artist'  'lion':4,5 'smith':6 'the':2,3 'willie':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1937':6 '7':7 'country':4 'exotica':2 'jazz':1 'jb':9 'oldies':3 'prerock':8 'unsorted':10
                                    'search_combo'  '00oldiepop':15 '1937':16 '7':17 'country':14 'exotica':12 'ground':3A 'jazz':11 'jb':19 'lion':8B,9B 'old':1A 'oldies':13 'prerock':18 'smith':10B 'stamping':2A 'stampingground':4A 'the':6B,7B 'unsorted':20 'willie':5B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-2', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'piano', 'jazz piano', 'stride', 'jazzpiano fathers']
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526509.327219  (2021-05-09 04:15:09)
                             'size'  3968645