======================== unified (from filesystem) ========================
                                         'bitrate'  '199.561'
                                        'duration'  '172'
                                          'artist'  'Golden Gate Quartet'
                                     'text_people'  ''
                                         'release'  'The Very Best of the Golden Gate Quartet'
                                           'title'  "Nobody Knows the Trouble I've Seen"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
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 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['gospel', 'blues', 'spiritual', 'jazz', 'soul']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '142.708'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Very Best of the Golden Gate Quartet'
'TBPM' (BPM (beats per minute))                     '142.708'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         "Nobody Knows the Trouble I've Seen"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Golden Gate Quartet'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '171919'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['gospel', 'blues', 'spiritual', 'jazz', 'soul']
'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'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.84 dB'
'TXXX:replaygain_track_peak'                        '0.724853'

========================== row from database ==========================
                                              'id'  1521625
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Golden Gate Quartet - Nobody Knows The Trouble I_ve Seen.wma.mp3
                                         'working'  None
                                         'bitrate'  199
                                    'duration_sec'  172
                                           'genre'  loc-namerica-country
                                        'filesize'  4294563
                                           'mtime'  1621628109
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music I_ve Seen.wma loc namerica country
                                      'tag_artist'  Golden Gate Quartet
                                     'tag_release'  The Very Best of the Golden Gate Quartet
                                       'tag_title'  Nobody Knows the Trouble I've Seen
                                             'bpm'  142.708
                                    'search_title'  'i':5 'ive':7 'knows':2 'nobody':1 'seen':8 'the':3 'trouble':4 've':6
                                   'search_artist'  'gate':2 'golden':1 'quartet':3
                                  'search_release'  'best':3 'gate':6 'golden':5 'of':4 'quartet':7 'the':1 'very':2
                                     'search_rest'  'country':4 'exotica':2 'i':7 'jazz':1 'loc':12 'music':6 'namerica':13 'old':5 'oldies':3 'seen':9 'seenwma':11 've':8 'wma':10
                                    'search_combo'  'best':14C 'country':22 'exotica':20 'gate':10B,17C 'golden':9B,16C 'i':5A,25 'ive':7A 'jazz':19 'knows':2A 'loc':30 'music':24 'namerica':31 'nobody':1A 'of':15C 'old':23 'oldies':21 'quartet':11B,18C 'seen':8A,27 'seenwma':29 'the':3A,12C 'trouble':4A 've':6A,26 'very':13C 'wma':28
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['gospel', 'blues', 'spiritual', 'jazz', 'soul']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628108.8449504  (2021-05-21 22:15:08)
                             'size'  4294563