======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '281'
                                          'artist'  'Big Joe Williams'
                                     'text_people'  ''
                                         'release'  'Nine String Guitar Blues'
                                           'title'  'Indiana Woman Blues'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-3', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['guitar', 'old blues', 'blues', 'delta blues', 'blues guitar']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '07'
                                      'tracktotal'  ''
                                            'date'  '1961'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '141.118'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Nine String Guitar Blues'
'TBPM' (BPM (beats per minute))                     '141.118'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TCOP' (Copyright message)                          '1990 Delmark Records'
'TDRC' (Recording time)                             '1961'
'TIT2' (Title/songname/content description)         'Indiana Woman Blues'
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '000000281287'
'TPE1' (Lead performer(s)/Soloist(s))               'Big Joe Williams'
'TPUB' (Publisher)                                  'Delmark Records'
'TRCK' (Track number/Position in set)               '07'
'TSRC' (ISRC (international standard recording code))  'US4B90462707'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['guitar', 'old blues', 'blues', 'delta blues', 'blues guitar']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.56 dB'
'TXXX:replaygain_track_peak'                        '0.506187'

========================== row from database ==========================
                                              'id'  978688
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Nine String Guitar Blues/07 Indiana Woman Blues.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  281
                                           'genre'  prerock-jb-blues
                                        'filesize'  11326583
                                           'mtime'  1620402491
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 07 prerock jb blues
                                      'tag_artist'  Big Joe Williams
                                     'tag_release'  Nine String Guitar Blues
                                       'tag_title'  Indiana Woman Blues
                                             'bpm'  141.118
                                    'search_title'  'blues':3 'indiana':1 'woman':2
                                   'search_artist'  'big':1 'joe':2 'williams':3
                                  'search_release'  'blues':4 'guitar':3 'nine':1 'string':2
                                     'search_rest'  'blues':7 'country':4 'exotica':2 'jazz':1 'jb':6 'oldies':3 'prerock':5
                                    'search_combo'  'big':4B 'blues':3A,10C,17 'country':14 'exotica':12 'guitar':9C 'indiana':1A 'jazz':11 'jb':16 'joe':5B 'nine':7C 'oldies':13 'prerock':15 'string':8C 'williams':6B 'woman':2A
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['guitar', 'old blues', 'blues', 'delta blues', 'blues guitar']
                                        'tag_date'  1961
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1620402491.1452727  (2021-05-07 17:48:11)
                             'size'  11326583