======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '159'
                                          'artist'  'Wiera Green z akomp. ork. "Syrena-Rekord"'
                                     'text_people'  ''
                                         'release'  'tango in europe'
                                           'title'  'Orchidea'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-OLDST-1', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '110.845'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'tango in europe'
'TBPM' (BPM (beats per minute))                     '110.845'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Orchidea'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Wiera Green z akomp. ork. "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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.68 dB'
'TXXX:replaygain_track_peak'                        '0.628469'

========================== row from database ==========================
                                              'id'  851099
                                            'path'  /data/Music/Bulk/00localcharacter/tango in europe (various)/Wiera Green z akomp. ork. Syrena-Rekord - Orchidea (1935).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  159
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  2548673
                                           'mtime'  1620528507
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter (various) (1935) loc style milonga
                                      'tag_artist'  Wiera Green z akomp. ork. "Syrena-Rekord"
                                     'tag_release'  tango in europe
                                       'tag_title'  Orchidea
                                             'bpm'  110.845
                                    'search_title'  'orchidea':1
                                   'search_artist'  'akomp':4,5 'green':2 'ork':6,7 'rekord':9 'syrena':8 'syrenarekord':10 'wiera':1 'z':3
                                  'search_release'  'europe':3 'in':2 'tango':1
                                     'search_rest'  '1935':3,4 'loc':5 'milonga':7 'style':6 'various':1,2
                                    'search_combo'  '1935':17,18 'akomp':5B,6B 'europe':14C 'green':3B 'in':13C 'loc':19 'milonga':21 'orchidea':1A 'ork':7B,8B 'rekord':10B 'style':20 'syrena':9B 'syrenarekord':11B 'tango':12C 'various':15,16 'wiera':2B 'z':4B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528506.7374744  (2021-05-09 04:48:26)
                             'size'  2548673