======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '151'
                                          'artist'  'Don Barreto'
                                     'text_people'  ''
                                         'release'  '1932-1935'
                                           'title'  'La Comparsa'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['world', 'all', 'latin', 'cuban', 'cuba']"
                                     'discogstags'  "['latin']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  '21'
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'loc-islands-cuba'
                                             'bpm'  '105.919'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            '0'
'COMM:iTunNORM:eng'                                 (' 0000016E 00000165 00001340 00001316 00005AEB 00005AEB 00005BFD 00005AEC '
 '000182A1 000182A1')
'COMM:iTunPGAP:eng'                                 '0'
'COMM:iTunSMPB:eng'                                 (' 00000000 00000210 00000B04 00000000006625EC 00000000 005C91F6 00000000 '
 '00000000 00000000 00000000 00000000 00000000')
'COMM:iTunes_CDDB_IDs:eng'                          '21++'
'TALB' (Album/Movie/Show title)                     '1932-1935'
'TBPM' (BPM (beats per minute))                     '105.919'
'TCON' (Content type, a.k.a. Genre)                 'loc-islands-cuba'
'TDRC' (Recording time)                             '1936'
'TENC' (Encoded by)                                 'iTunes 10.6.3.25'
'TIT2' (Title/songname/content description)         'La Comparsa'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Don Barreto & His Orchestra'
'TPE2' (Band/orchestra/accompaniment)               'Don Barreto'
'TPOS' (Part of a set)                              '2/2'
'TRCK' (Track number/Position in set)               '18/21'
'TSO2'                                              'Don Barreto'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'latin'
'TXXX:lastfmtags'                                   ['world', 'all', 'latin', 'cuban', 'cuba']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.48 dB'
'TXXX:replaygain_track_peak'                        '0.508041'

========================== row from database ==========================
                                              'id'  1455574
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1932/2-18 La Comparsa.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  151
                                           'genre'  loc-islands-cuba
                                        'filesize'  6129664
                                           'mtime'  1620534992
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 18 loc islands cuba
                                      'tag_artist'  Don Barreto
                                     'tag_release'  1932-1935
                                       'tag_title'  La Comparsa
                                             'bpm'  105.919
                                    'search_title'  'comparsa':2 'la':1
                                   'search_artist'  'barreto':2 'don':1
                                  'search_release'  '1932':1 '19321935':3 '1935':2
                                     'search_rest'  '00oldiepop':5 '18':6 'country':4 'cuba':9 'exotica':2 'islands':8 'jazz':1 'loc':7 'oldies':3
                                    'search_combo'  '00oldiepop':12 '18':13 '1932':5C '19321935':7C '1935':6C 'barreto':4B 'comparsa':2A 'country':11 'cuba':16 'don':3B 'exotica':9 'islands':15 'jazz':8 'la':1A 'loc':14 'oldies':10
                                    'tag_tracknum'  18
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['world', 'all', 'latin', 'cuban', 'cuba']
                                        'tag_date'  1936
                                     'discogstags'  ['latin']

============================== file details ==============================
                                           'mtime'  1620534992.4652302  (2021-05-09 06:36:32)
                             'size'  6129664