======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '157'
                                          'artist'  'Bix Beiderbecke'
                                     'text_people'  ''
                                         'release'  'Felix the Cat'
                                           'title'  'Tiger Rag'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['dixieland jazz', '20s', 'jazz', 'dixieland', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1920'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-dixiestyle'
                                             'bpm'  '84.245'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Felix the Cat'
'TBPM' (BPM (beats per minute))                     '84.245'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-dixiestyle'
'TDRC' (Recording time)                             '1920'
'TIT2' (Title/songname/content description)         'Tiger Rag'
'TKEY' (Initial key)                                '5B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bix Beiderbecke'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['dixieland jazz', '20s', 'jazz', 'dixieland', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'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'                        '0.373801'

========================== row from database ==========================
                                              'id'  679284
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Bix Beiderbecke/Felix The Cat/04. Tiger Rag.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  157
                                           'genre'  prerock-jb-jazz-o-dixiestyle
                                        'filesize'  3150241
                                           'mtime'  1620528280
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country The 04. prerock jb jazz o dixiestyle
                                      'tag_artist'  Bix Beiderbecke
                                     'tag_release'  Felix the Cat
                                       'tag_title'  Tiger Rag
                                             'bpm'  84.245
                                    'search_title'  'rag':2 'tiger':1
                                   'search_artist'  'beiderbecke':2 'bix':1
                                  'search_release'  'cat':3 'felix':1 'the':2
                                     'search_rest'  '04':6,7 'country':4 'dixiestyle':11 'exotica':2 'jazz':1 'jb':9 'o':10 'oldies':3 'prerock':8 'the':5
                                    'search_combo'  '04':13,14 'beiderbecke':4B 'bix':3B 'cat':7C 'country':11 'dixiestyle':18 'exotica':9 'felix':5C 'jazz':8 'jb':16 'o':17 'oldies':10 'prerock':15 'rag':2A 'the':6C,12 'tiger':1A
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['dixieland jazz', '20s', 'jazz', 'dixieland', 'swing']
                                        'tag_date'  1920
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620528280.1583545  (2021-05-09 04:44:40)
                             'size'  3150241