<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '137.115'
                                        'duration'  '160'
                                          'artist'  'Mon Rivera y su Orquesta'
                                     'text_people'  ''
                                         'release'  '!Saoco! Vol. 2: Bomba, Plena &amp; the Roots of Salsa in Puerto Rico 1955-1967'
                                           'title'  'A Papa Cuando Venga'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['latin', 'puerto rican']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '27'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-puertorico'
                                             'bpm'  '99.910'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f9537d75c10>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1388182"/>
'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))                     '99.910'
'TCON' (Content type, a.k.a. Genre)                 'loc-puertorico'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'A Papa Cuando Venga'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Mon Rivera y su Orquesta'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Vampisoul'
'TRCK' (Track number/Position in set)               '27'
'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'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['latin', 'puerto rican']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'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'                        '+1.19 dB'
'TXXX:replaygain_track_peak'                        '0.349582'

========================== row from database ==========================
                                              'id'  1388182
                                            'path'  /data/Music/Bulk/00localcharacter/SAOCO! 2 - BOMBA PLENA & THE ROOTS OF SALSA IN PUERTO RICO 1955-1967 [VAMPISOUL] (2013)/27 Mon Rivera y su Orquesta - A Papá Cuando Venga.mp3
                                         'working'  None
                                         'bitrate'  137
                                    'duration_sec'  160
                                           'genre'  loc-puertorico
                                        'filesize'  2827012
                                           'mtime'  1621698171
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter SAOCO! BOMBA PLENA THE ROOTS OF SALSA IN PUERTO RICO [VAMPISOUL] (2013) 27 Papá loc puertorico
                                      'tag_artist'  Mon Rivera y su Orquesta
                                     'tag_release'  !Saoco! Vol. 2: Bomba, Plena & the Roots of Salsa in Puerto Rico 1955-1967
                                       'tag_title'  A Papa Cuando Venga
                                             'bpm'  99.91
                                    'search_title'  'a':1 'cuando':3 'papa':2 'venga':4
                                   'search_artist'  'mon':1 'orquesta':5 'rivera':2 'su':4 'y':3
                                  '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 '27':15 'bomba':2 'in':8 'loc':18 'of':6 'papa':16,17 'plena':3 'puerto':9 'puertorico':19 'rico':10 'roots':5 'salsa':7 'saoco':1 'the':4 'vampisoul':11,12
                                    'search_combo'  '1955':25C '19551967':27C '1967':26C '2':13C,14C '2013':40,41 '27':42 'a':1A 'bomba':15C,16C,29 'cuando':3A 'in':22C,35 'loc':45 'mon':5B 'of':20C,33 'orquesta':9B 'papa':2A,43,44 'plena':17C,30 'puerto':23C,36 'puertorico':46 'rico':24C,37 'rivera':6B 'roots':19C,32 'salsa':21C,34 'saoco':10C,28 'su':8B 'the':18C,31 'vampisoul':38,39 'venga':4A 'vol':11C,12C 'y':7B
                                    'tag_tracknum'  27
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['latin', 'puerto rican']
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698170.5929286  (2021-05-22 17:42:50)
                             'size'  2827012