======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '343'
                                          'artist'  'Sweet Emma'
                                     'text_people'  ''
                                         'release'  'Preservation Hall JB'
                                           'title'  "I'm alone because I love you"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', 'Q-JZFKS-3', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'new orleans', 'classic jazz', 'dixieland jazz', 'dixieland']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-dixiestyle'
                                             'bpm'  '146.000'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Preservation Hall JB'
'TBPM' (BPM (beats per minute))                     '146.000'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-dixiestyle'
'TIT2' (Title/songname/content description)         "I'm alone because I love you"
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Sweet Emma'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', 'new orleans', 'classic jazz', 'dixieland jazz', 'dixieland']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.68 dB'
'TXXX:replaygain_track_peak'                        '0.494240'

========================== row from database ==========================
                                              'id'  1506746
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00jazz/Preservation Hall JB/Sweet Emma - I_m alone because I love you.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  343
                                           'genre'  prerock-jb-jazz-o-dixiestyle
                                        'filesize'  5506834
                                           'mtime'  1620523989
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00jazz I_m prerock jb jazz dixiestyle
                                      'tag_artist'  Sweet Emma
                                     'tag_release'  Preservation Hall JB
                                       'tag_title'  I'm alone because I love you
                                             'bpm'  146.0
                                    'search_title'  'alone':4 'because':5 'i':1,6 'im':3 'love':7 'm':2 'you':8
                                   'search_artist'  'emma':2 'sweet':1
                                  'search_release'  'hall':2 'jb':3 'preservation':1
                                     'search_rest'  '00jazz':5 'country':4 'dixiestyle':10 'exotica':2 'i':6 'jazz':1 'jb':9 'm':7 'oldies':3 'prerock':8
                                    'search_combo'  '00jazz':18 'alone':4A 'because':5A 'country':17 'dixiestyle':23 'emma':10B 'exotica':15 'hall':12C 'i':1A,6A,19 'im':3A 'jazz':14 'jb':13C,22 'love':7A 'm':2A,20 'oldies':16 'prerock':21 'preservation':11C 'sweet':9B 'you':8A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'new orleans', 'classic jazz', 'dixieland jazz', 'dixieland']
                                        'tag_date'  
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620523989.4226837  (2021-05-09 03:33:09)
                             'size'  5506834