======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '204'
                                          'artist'  'Adam Aston & Orkiestra tan. "Syrena-Rekord"'
                                     'text_people'  ''
                                         'release'  'tango in europe'
                                           'title'  'Crasem v sercu co[ rozkwita'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '113.517'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'tango in europe'
'TBPM' (BPM (beats per minute))                     '113.517'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TIT2' (Title/songname/content description)         'Crasem v sercu co[ rozkwita'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Adam Aston & Orkiestra tan. "Syrena-Rekord"'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.93 dB'
'TXXX:replaygain_track_peak'                        '0.623089'

========================== row from database ==========================
                                              'id'  851352
                                            'path'  /data/Music/Bulk/00localcharacter/tango in europe (various)/Orkiestra tan. Syrena-Rekord & Adam Aston - Crasem v sercu coœ rozkwita (1937).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  204
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  3279266
                                           'mtime'  1620528485
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter (various) coœ (1937) loc style milonga
                                      'tag_artist'  Adam Aston & Orkiestra tan. "Syrena-Rekord"
                                     'tag_release'  tango in europe
                                       'tag_title'  Crasem v sercu co[ rozkwita
                                             'bpm'  113.517
                                    'search_title'  'co':4,5 'crasem':1 'rozkwita':6 'sercu':3 'v':2
                                   'search_artist'  'adam':1 'aston':2 'orkiestra':3 'rekord':7 'syrena':6 'syrenarekord':8 'tan':4,5
                                  'search_release'  'europe':3 'in':2 'tango':1
                                     'search_rest'  '1937':4,5 'co':3 'loc':6 'milonga':8 'style':7 'various':1,2
                                    'search_combo'  '1937':21,22 'adam':7B 'aston':8B 'co':4A,5A,20 'crasem':1A 'europe':17C 'in':16C 'loc':23 'milonga':25 'orkiestra':9B 'rekord':13B 'rozkwita':6A 'sercu':3A 'style':24 'syrena':12B 'syrenarekord':14B 'tan':10B,11B 'tango':15C 'v':2A 'various':18,19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528485.0716617  (2021-05-09 04:48:05)
                             'size'  3279266