======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '136'
                                          'artist'  'Carlos Gardel'
                                     'text_people'  ''
                                         'release'  "1920's rare and popular music"
                                           'title'  'La ultima copa'
                                           '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-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['tango argentino', 'argentina', 'latin', 'oldies', 'tango']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1927'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga;loc-unsorted'
                                             'bpm'  '111.394'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     "1920's rare and popular music"
'TBPM' (BPM (beats per minute))                     '111.394'
'TCON' (Content type, a.k.a. Genre)                 ['loc-style-tango or milonga', 'loc-unsorted']
'TDRC' (Recording time)                             '1927'
'TIT2' (Title/songname/content description)         'La ultima copa'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '136147'
'TPE1' (Lead performer(s)/Soloist(s))               'Carlos Gardel'
'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:lastfmtags'                                   ['tango argentino', 'argentina', 'latin', 'oldies', 'tango']
'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'                        '+1.96 dB'
'TXXX:replaygain_track_peak'                        '0.455691'

========================== row from database ==========================
                                              'id'  1161728
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Carlos Gardel - La ultima copa (1927).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  136
                                           'genre'  loc-style-tango or milonga;loc-unsorted
                                        'filesize'  2190618
                                           'mtime'  1620528160
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s (1927) loc style tango or milonga;loc unsorted
                                      'tag_artist'  Carlos Gardel
                                     'tag_release'  1920's rare and popular music
                                       'tag_title'  La ultima copa
                                             'bpm'  111.394
                                    'search_title'  'copa':3 'la':1 'ultima':2
                                   'search_artist'  'carlos':1 'gardel':2
                                  'search_release'  '1920':1 '1920s':3 'and':5 'music':7 'popular':6 'rare':4 's':2
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1927':8,9 '1930s':7 'country':4 'exotica':2 'jazz':1 'loc':10,15,17 'milonga':14,16 'oldies':3 'or':13 'style':11 'tango':12 'unsorted':18
                                    'search_combo'  '00oldiepop':17 '1920':6C '1920s':8C,18 '1927':20,21 '1930s':19 'and':10C 'carlos':4B 'copa':3A 'country':16 'exotica':14 'gardel':5B 'jazz':13 'la':1A 'loc':22,27,29 'milonga':26,28 'music':12C 'oldies':15 'or':25 'popular':11C 'rare':9C 's':7C 'style':23 'tango':24 'ultima':2A 'unsorted':30
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           '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'  ['tango argentino', 'argentina', 'latin', 'oldies', 'tango']
                                        'tag_date'  1927
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528160.1707516  (2021-05-09 04:42:40)
                             'size'  2190618