======================== unified (from filesystem) ========================
                                         'bitrate'  '256.947'
                                        'duration'  '126'
                                          'artist'  'Elvis Presley'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Baby Let's Play House (Alt. Version)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rocknroll'
                                             'bpm'  '114.479'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '114.479'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rocknroll'
'TIT2' (Title/songname/content description)         "Baby Let's Play House (Alt. Version)"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Elvis Presley'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Mp3gain_minmax'                               '127,206'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.47 dB'
'TXXX:replaygain_track_peak'                        '0.498559'

========================== row from database ==========================
                                              'id'  1520534
                                            'path'  /data/Music/Bulk/00poprockelectronic/Elvis Presley/Elvis Presley - 15 - Baby Let_s Play House (Alt. Version).mp3
                                         'working'  None
                                         'bitrate'  257
                                    'duration_sec'  126
                                           'genre'  rock-pop-early-rocknroll
                                        'filesize'  4082388
                                           'mtime'  1622659497
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 15 Let_s rock pop early rocknroll
                                      'tag_artist'  Elvis Presley
                                     'tag_release'  None
                                       'tag_title'  Baby Let's Play House (Alt. Version)
                                             'bpm'  114.479
                                    'search_title'  'alt':7,8 'baby':1 'house':6 'let':2 'lets':4 'play':5 's':3 'version':9,10
                                   'search_artist'  'elvis':1 'presley':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'early':6 'let':2 'pop':5 'rock':4 'rocknroll':7 's':3
                                    'search_combo'  '00poprockelectronic':13 'alt':7A,8A 'baby':1A 'early':18 'elvis':11B 'house':6A 'let':2A,14 'lets':4A 'play':5A 'pop':17 'presley':12B 'rock':16 'rocknroll':19 's':3A,15 'version':9A,10A
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['rock and roll', 'rock n roll', 'rock', 'oldies', 'classic rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659497.4538093  (2021-06-02 20:44:57)
                             'size'  4082388