======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '211'
                                          'artist'  'Alexander Tsfasman'
                                     'text_people'  'Oskar Strok'
                                         'release'  'plastictango tango'
                                           'title'  'Sleep, My Heart (Sleep, My Poor Heart)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-4', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-1', 'q-other-2', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1939'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '99.371'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'plastictango tango'
'TBPM' (BPM (beats per minute))                     '99.371'
'TCOM' (Composer)                                   'Oskar Strok'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDRC' (Recording time)                             '1939'
'TENC' (Encoded by)                                 'iTunes v4.6'
'TIT2' (Title/songname/content description)         'Sleep, My Heart (Sleep, My Poor Heart)'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Alexander Tsfasman'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:MP3GAIN_MINMAX'                               '109,184'
'TXXX:MP3GAIN_UNDO'                                 '+002,+002,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.23 dB'
'TXXX:replaygain_track_peak'                        '0.731568'

========================== row from database ==========================
                                              'id'  242345
                                            'path'  /data/Music/Bulk/00localcharacter/plastictango/tango/tango 112.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  211
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  5067771
                                           'mtime'  1620528453
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 112 loc style milonga
                                      'tag_artist'  Alexander Tsfasman
                                     'tag_release'  plastictango tango
                                       'tag_title'  Sleep, My Heart (Sleep, My Poor Heart)
                                             'bpm'  99.371
                                    'search_title'  'heart':4,7 'my':3 'poor':6 'sleep':1,2,5
                                   'search_artist'  'alexander':1 'tsfasman':2
                                  'search_release'  'plastictango':1 'tango':2
                                     'search_rest'  '112':1 'loc':2 'milonga':4 'style':3
                                    'search_combo'  '112':12 'alexander':8B 'heart':4A,7A 'loc':13 'milonga':15 'my':3A 'plastictango':10C 'poor':6A 'sleep':1A,2A,5A 'style':14 'tango':11C 'tsfasman':9B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1939
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528453.2309089  (2021-05-09 04:47:33)
                             'size'  5067771