======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '170'
                                          'artist'  'Quintin Verdz et son Orchestre Typique'
                                     'text_people'  'R. Iriarte'
                                         'release'  'tango in europe'
                                           'title'  'Comparsa criolla'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'Q-PIANO-3', 'q-chart-2', 'q-drums-1', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1948'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '126.095'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'MCDI' (Music CD identifier)                        MCDI(data=b'1\x005\x00+\x009\x006\x00+\x003\x005\x005\x00A\x00+\x006\x007\x002\x000\x00+\x009\x008\x00B\x001\x00+\x00C\x00D\x006\x001\x00+\x001\x000\x006\x005\x006\x00+\x001\x004\x000\x005\x006\x00+\x001\x006\x00D\x00A\x00D\x00+\x001\x009\x00E\x00A\x003\x00+\x001\x00D\x000\x000\x00C\x00+\x002\x000\x008\x004\x00E\x00+\x002\x004\x002\x005\x006\x00+\x002\x006\x00F\x002\x003\x00+\x002\x009\x00B\x00C\x00B\x00+\x002\x00D\x002\x00B\x007\x00+\x003\x000\x008\x007\x00E\x00+\x003\x004\x004\x009\x006\x00+\x003\x007\x00A\x00D\x007\x00+\x003\x00A\x00D\x006\x002\x00+\x003\x00D\x00B\x004\x00D\x00+\x004\x000\x008\x00B\x00D\x00+\x004\x003\x00A\x00B\x00A\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     'tango in europe'
'TBPM' (BPM (beats per minute))                     '126.095'
'TCOM' (Composer)                                   'R. Iriarte'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDRC' (Recording time)                             '1948'
'TIT2' (Title/songname/content description)         'Comparsa criolla'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Quintin Verdz et son Orchestre Typique'
'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-PIANO'                                      '3'
'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'                                      '4'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.54 dB'
'TXXX:replaygain_track_peak'                        '0.512254'

========================== row from database ==========================
                                              'id'  851254
                                            'path'  /data/Music/Bulk/00localcharacter/tango in europe (various)/Quintin Verdú et son Orchestre Typique - Comparsa criolla (1948).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  170
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  2726945
                                           'mtime'  1620528490
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter (various) Verdú (1948) loc style or milonga
                                      'tag_artist'  Quintin Verdz et son Orchestre Typique
                                     'tag_release'  tango in europe
                                       'tag_title'  Comparsa criolla
                                             'bpm'  126.095
                                    'search_title'  'comparsa':1 'criolla':2
                                   'search_artist'  'et':3 'orchestre':5 'quintin':1 'son':4 'typique':6 'verdz':2
                                  'search_release'  'europe':3 'in':2 'tango':1
                                     'search_rest'  '1948':5,6 'loc':7 'milonga':10 'or':9 'style':8 'various':1,2 'verdu':3,4
                                    'search_combo'  '1948':16,17 'comparsa':1A 'criolla':2A 'et':5B 'europe':11C 'in':10C 'loc':18 'milonga':21 'or':20 'orchestre':7B 'quintin':3B 'son':6B 'style':19 'tango':9C 'typique':8B 'various':12,13 'verdu':14,15 'verdz':4B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-3', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1948
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528490.4789758  (2021-05-09 04:48:10)
                             'size'  2726945