======================== unified (from filesystem) ========================
                                         'bitrate'  '209.147'
                                        'duration'  '212'
                                          'artist'  'Squirrel Nut Zippers'
                                     'text_people'  ''
                                         'release'  'Perennial Favorites'
                                           'title'  'Ghost of Stephen Foster'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['retro swing', 'alternative', 'jazz', 'retro', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-pop'
                                             'bpm'  '141.611'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'POPM:Windows Media Player 9 Series'                POPM(email='Windows Media Player 9 Series', rating=196, count=0)
'TALB' (Album/Movie/Show title)                     'Perennial Favorites'
'TBPM' (BPM (beats per minute))                     '141.611'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-pop'
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'Ghost of Stephen Foster'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Squirrel Nut Zippers'
'TPE2' (Band/orchestra/accompaniment)               'Squirrel Nut Zippers'
'TPUB' (Publisher)                                  'Mammoth Records'
'TRCK' (Track number/Position in set)               '3'
'TSOP' (Performer sort order)                       'Squirrel Nut Zippers'
'TXXX:ALBUMARTISTSORT'                              'Squirrel Nut Zippers'
'TXXX:ASIN'                                         'B000009PNN'
'TXXX:BARCODE'                                      '035498016943'
'TXXX:CATALOGNUMBER'                                '354 980169-4'
'TXXX:FMPS_Rating'                                  '0.8'
'TXXX:MusicBrainz Album Artist Id'                  '31810c40-932a-4f2d-8cfd-17849844e2a6'
'TXXX:MusicBrainz Album Id'                         'e890d096-262f-434b-a4ab-78d673b9cc53'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '31810c40-932a-4f2d-8cfd-17849844e2a6'
'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'                                   ['retro swing', 'alternative', 'jazz', 'retro', 'swing']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'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'                        '-0.57 dB'
'TXXX:replaygain_track_peak'                        '0.337857'

========================== row from database ==========================
                                              'id'  678682
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Squirrel Nut Zippers/Perennial_Favorites/mp3/03 - Ghost Of Stephen Foster.mp3
                                         'working'  None
                                         'bitrate'  209
                                    'duration_sec'  212
                                           'genre'  prerock-jb-jazz-pop
                                        'filesize'  5554110
                                           'mtime'  1620535510
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Perennial_Favorites mp3 03 Of prerock jb jazz pop
                                      'tag_artist'  Squirrel Nut Zippers
                                     'tag_release'  Perennial Favorites
                                       'tag_title'  Ghost of Stephen Foster
                                             'bpm'  141.611
                                    'search_title'  'foster':4 'ghost':1 'of':2 'stephen':3
                                   'search_artist'  'nut':2 'squirrel':1 'zippers':3
                                  'search_release'  'favorites':2 'perennial':1
                                     'search_rest'  'country':4 'exotica':2 'favorites':6 'jazz':1 'jb':10 'mp3':7 'of':8 'oldies':3 'perennial':5 'pop':11 'prerock':9
                                    'search_combo'  'country':13 'exotica':11 'favorites':9C,15 'foster':4A 'ghost':1A 'jazz':10 'jb':19 'mp3':16 'nut':6B 'of':2A,17 'oldies':12 'perennial':8C,14 'pop':20 'prerock':18 'squirrel':5B 'stephen':3A 'zippers':7B
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['retro swing', 'alternative', 'jazz', 'retro', 'swing']
                                        'tag_date'  1998
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620535510.4707727  (2021-05-09 06:45:10)
                             'size'  5554110