<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '217.056'
                                        'duration'  '160'
                                          'artist'  'Raful'
                                     'text_people'  ''
                                         'release'  '!Saoco! Vol. 2: Bomba, Plena &amp; the Roots of Salsa in Puerto Rico 1955-1967'
                                           'title'  'La Negra Merced'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-puertorico'
                                             'bpm'  '86.622'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382f1eb0>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1388030"/>
'TALB' (Album/Movie/Show title)                     '!Saoco! Vol. 2: Bomba, Plena &amp; the Roots of Salsa in Puerto Rico 1955-1967'
'TBPM' (BPM (beats per minute))                     '86.622'
'TCON' (Content type, a.k.a. Genre)                 'loc-puertorico'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'La Negra Merced'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Raful'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Vampisoul'
'TRCK' (Track number/Position in set)               '21'
'TXXX:ENCODER'                                      'reference libFLAC 1.2.1 20070917'
'TXXX:ENSEMBLE'                                     'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.99 dB'
'TXXX:replaygain_track_peak'                        '0.308960'

========================== row from database ==========================
                                              'id'  1388030
                                            'path'  /data/Music/Bulk/00localcharacter/SAOCO! 2 - BOMBA PLENA & THE ROOTS OF SALSA IN PUERTO RICO 1955-1967 [VAMPISOUL] (2013)/21 Raful - La Negra Merced.mp3
                                         'working'  None
                                         'bitrate'  217
                                    'duration_sec'  160
                                           'genre'  loc-puertorico
                                        'filesize'  4443160
                                           'mtime'  1621629764
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter SAOCO! BOMBA PLENA THE ROOTS OF SALSA IN PUERTO RICO [VAMPISOUL] (2013) 21 loc puertorico
                                      'tag_artist'  Raful
                                     'tag_release'  !Saoco! Vol. 2: Bomba, Plena & the Roots of Salsa in Puerto Rico 1955-1967
                                       'tag_title'  La Negra Merced
                                             'bpm'  86.622
                                    'search_title'  'la':1 'merced':3 'negra':2
                                   'search_artist'  'raful':1
                                  'search_release'  '1955':16 '19551967':18 '1967':17 '2':4,5 'bomba':6,7 'in':13 'of':11 'plena':8 'puerto':14 'rico':15 'roots':10 'salsa':12 'saoco':1 'the':9 'vol':2,3
                                     'search_rest'  '2013':13,14 '21':15 'bomba':2 'in':8 'loc':16 'of':6 'plena':3 'puerto':9 'puertorico':17 'rico':10 'roots':5 'salsa':7 'saoco':1 'the':4 'vampisoul':11,12
                                    'search_combo'  '1955':20C '19551967':22C '1967':21C '2':8C,9C '2013':35,36 '21':37 'bomba':10C,11C,24 'in':17C,30 'la':1A 'loc':38 'merced':3A 'negra':2A 'of':15C,28 'plena':12C,25 'puerto':18C,31 'puertorico':39 'raful':4B 'rico':19C,32 'roots':14C,27 'salsa':16C,29 'saoco':5C,23 'the':13C,26 'vampisoul':33,34 'vol':6C,7C
                                    'tag_tracknum'  21
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629764.2047038  (2021-05-21 22:42:44)
                             'size'  4443160