======================== unified (from filesystem) ========================
                                         'bitrate'  '219.62'
                                        'duration'  '149'
                                          'artist'  'Osvaldo Fresedo'
                                     'text_people'  ''
                                         'release'  'El tango: Pasisn y emocisn'
                                           'title'  'Derecho viejo'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-3', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-1', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['tango', 'tango argentino', 'argentina']"
                                     'discogstags'  "['latin']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  '21'
                                            'date'  '2007'
                                        'comments'  ''
                                           'genre'  'loc-style-tango or milonga'
                                             'bpm'  '129.233'
                                             'key'  '4A'
                                        'acoustid'  '5622f2e5-ac54-4938-bcb4-9fbe26380a24'
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM::eng'                                         'Exact Audio Copy'
'COMM:ID3v1 Comment:XXX'                            'Exact Audio Copy'
'TALB' (Album/Movie/Show title)                     'El tango: Pasisn y emocisn'
'TBPM' (BPM (beats per minute))                     '129.233'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-tango or milonga'
'TDOR' (Original release time)                      '2007'
'TDRC' (Recording time)                             '2007-10-01'
'TIT2' (Title/songname/content description)         'Derecho viejo'
'TKEY' (Initial key)                                '4A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Osvaldo Fresedo'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '5/10'
'TPUB' (Publisher)                                  'Documents'
'TRCK' (Track number/Position in set)               '16/21'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Fresedo, Osvaldo'
'TXXX:ASIN'                                         ['B000VX1RFS', 'B000VX1RFS']
'TXXX:Acoustid Id'                                  '5622f2e5-ac54-4938-bcb4-9fbe26380a24'
'TXXX:Albumartist'                                  'Various Artists'
'TXXX:Albumartistsort'                              'Various Artists'
'TXXX:Artistsort'                                   'Fresedo, Osvaldo'
'TXXX:BARCODE'                                      '4011222317599'
'TXXX:CATALOGNUMBER'                                '231759'
'TXXX:Country'                                      'Argentina'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '726d19dd-cfea-466a-9447-906d5b829b5e'
'TXXX:MusicBrainz Album Release Country'            'DE'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'compilation'
'TXXX:MusicBrainz Artist Id'                        'a0e3d6ab-4fdb-4886-a0f8-f950e638bcc6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:Source'                                       'FLAC'
'TXXX:Subgenre'                                     'Guardia Nueva'
'TXXX:discogstags'                                  'latin'
'TXXX:lastfmtags'                                   ['tango', 'tango argentino', 'argentina']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.33 dB'
'TXXX:replaygain_track_peak'                        '0.496806'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'cdfec046-0e6d-4e76-b1db-4d6b7fef319a')

========================== row from database ==========================
                                              'id'  1383360
                                            'path'  /data/Music/Bulk/00localcharacter/Orquesta Tmpica Victor & Alberto Carol - Cd05/16. Derecho Viejo (Osvaldo Fresedo).mp3
                                         'working'  None
                                         'bitrate'  219
                                    'duration_sec'  149
                                           'genre'  loc-style-tango or milonga
                                        'filesize'  4159210
                                           'mtime'  1620528232
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Orquesta Tmpica Victor & Alberto Carol Cd05 16. Viejo (Osvaldo Fresedo) loc style or milonga
                                      'tag_artist'  Osvaldo Fresedo
                                     'tag_release'  El tango: Pasisn y emocisn
                                       'tag_title'  Derecho viejo
                                             'bpm'  129.233
                                    'search_title'  'derecho':1 'viejo':2
                                   'search_artist'  'fresedo':2 'osvaldo':1
                                  'search_release'  'el':1 'emocisn':6 'pasisn':4 'tango':2,3 'y':5
                                     'search_rest'  '16':7,8 'alberto':4 'carol':5 'cd05':6 'fresedo':12,13 'loc':14 'milonga':17 'or':16 'orquesta':1 'osvaldo':10,11 'style':15 'tmpica':2 'victor':3 'viejo':9
                                    'search_combo'  '16':17,18 'alberto':14 'carol':15 'cd05':16 'derecho':1A 'el':5C 'emocisn':10C 'fresedo':4B,22,23 'loc':24 'milonga':27 'or':26 'orquesta':11 'osvaldo':3B,20,21 'pasisn':8C 'style':25 'tango':6C,7C 'tmpica':12 'victor':13 'viejo':2A,19 'y':9C
                                    'tag_tracknum'  16
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-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-PLAY-2', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['tango', 'tango argentino', 'argentina']
                                        'tag_date'  2007
                                     'discogstags'  ['latin']

============================== file details ==============================
                                           'mtime'  1620528232.129416  (2021-05-09 04:43:52)
                             'size'  4159210