======================== unified (from filesystem) ========================
                                         'bitrate'  '127.989'
                                        'duration'  '307'
                                          'artist'  'Leonard Cohen'
                                     'text_people'  'Paul Buckmaster'
                                         'release'  'Songs of Love and Hate'
                                           'title'  'Famous Blue Raincoat'
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                                      'lastfmtags'  "['blues', 'canadian', 'rock', 'folk', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  '8'
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '144.335'
                                             'key'  '8A'
                                        '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)                     'Songs of Love and Hate'
'TBPM' (BPM (beats per minute))                     '144.335'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Famous Blue Raincoat'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Leonard Cohen'
'TPE2' (Band/orchestra/accompaniment)               'Leonard Cohen'
'TPE3' (Conductor/performer refinement)             'Paul Buckmaster'
'TPUB' (Publisher)                                  'Columbia Records'
'TRCK' (Track number/Position in set)               '6/8'
'TSOP' (Performer sort order)                       'Cohen, Leonard'
'TSRC' (ISRC (international standard recording code))  'USSM19919473'
'TXXX:ALBUMARTISTSORT'                              'Cohen, Leonard'
'TXXX:ASIN'                                         'B000002AZY'
'TXXX:BARCODE'                                      '886970474122'
'TXXX:CATALOGNUMBER'                                'C 30103'
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'TXXX:MusicBrainz Album Id'                         '535bf80d-bde6-4a8c-b89a-45f69e56a025'
'TXXX:MusicBrainz Album Release Country'            'US'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        '65314b12-0e08-43fa-ba33-baaa7b874c15'
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'TXXX:Q-LOCALNESS'                                  '1'
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'TXXX:Q-UNU'                                        '1'
'TXXX:added_timestamp'                              '128930990202923527'
'TXXX:involved people'                              'engineer'
'TXXX:lastfmtags'                                   ['blues', 'canadian', 'rock', 'folk', 'singer songwriter']
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'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
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'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.54 dB'
'TXXX:replaygain_track_peak'                        '0.850008'

========================== row from database ==========================
                                              'id'  1328543
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/Leonard Cohen-Songs Of Love And Hate-06-Famous Blue Raincoat.mp3
                                         'working'  None
                                         'bitrate'  127
                                    'duration_sec'  307
                                           'genre'  ifs-songwriter
                                        'filesize'  4918887
                                           'mtime'  1622658724
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] Of And 06 ifs songwriter
                                      'tag_artist'  Leonard Cohen
                                     'tag_release'  Songs of Love and Hate
                                       'tag_title'  Famous Blue Raincoat
                                             'bpm'  144.335
                                    'search_title'  'blue':2 'famous':1 'raincoat':3
                                   'search_artist'  'cohen':2 'leonard':1
                                  'search_release'  'and':4 'hate':5 'love':3 'of':2 'songs':1
                                     'search_rest'  '00poprockelectronic':1 'and':8 'files':5,6 'ifs':9 'loose':3,4 'of':7 'songwriter':10 'unsorted':2
                                    'search_combo'  '00poprockelectronic':11 'and':9C,18 'blue':2A 'cohen':5B 'famous':1A 'files':15,16 'hate':10C 'ifs':19 'leonard':4B 'loose':13,14 'love':8C 'of':7C,17 'raincoat':3A 'songs':6C 'songwriter':20 'unsorted':12
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'canadian', 'rock', 'folk', 'singer songwriter']
                                        'tag_date'  1970
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622658724.4888346  (2021-06-02 20:32:04)
                             'size'  4918887