<pre>
======================== unified (from filesystem) ========================
                                         'bitrate'  '215.79'
                                        'duration'  '171'
                                          'artist'  'Paquito Alvarez'
                                     'text_people'  ''
                                         'release'  '!Saoco! Vol. 2: Bomba, Plena &amp; the Roots of Salsa in Puerto Rico 1955-1967'
                                           'title'  'Tras Tres Tragos'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-2', 'Q-UNU-2', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-3', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '18'
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'loc-puertorico'
                                             'bpm'  '101.870'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================<mutagen.mp3.MPEGInfo object at 0x7f95382da940>

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''<br/>                                     <img style="width:150px" src="image?fid=1386223"/>
'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))                     '101.870'
'TCON' (Content type, a.k.a. Genre)                 'loc-puertorico'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Tras Tres Tragos'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Paquito Alvarez'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Vampisoul'
'TRCK' (Track number/Position in set)               '18'
'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'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.95 dB'
'TXXX:replaygain_track_peak'                        '0.358166'

========================== row from database ==========================
                                              'id'  1386223
                                            'path'  /data/Music/Bulk/00localcharacter/SAOCO! 2 - BOMBA PLENA & THE ROOTS OF SALSA IN PUERTO RICO 1955-1967 [VAMPISOUL] (2013)/18 Paquito Álvarez - Tras Tres Tragos.mp3
                                         'working'  None
                                         'bitrate'  215
                                    'duration_sec'  171
                                           'genre'  loc-puertorico
                                        'filesize'  4717902
                                           'mtime'  1621629764
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter SAOCO! BOMBA PLENA THE ROOTS OF SALSA IN PUERTO RICO [VAMPISOUL] (2013) 18 Álvarez loc puertorico
                                      'tag_artist'  Paquito Alvarez
                                     'tag_release'  !Saoco! Vol. 2: Bomba, Plena & the Roots of Salsa in Puerto Rico 1955-1967
                                       'tag_title'  Tras Tres Tragos
                                             'bpm'  101.87
                                    'search_title'  'tragos':3 'tras':1 'tres':2
                                   'search_artist'  'alvarez':2 'paquito':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'  '18':15 '2013':13,14 'alvarez':16,17 'bomba':2 'in':8 'loc':18 'of':6 'plena':3 'puerto':9 'puertorico':19 'rico':10 'roots':5 'salsa':7 'saoco':1 'the':4 'vampisoul':11,12
                                    'search_combo'  '18':38 '1955':21C '19551967':23C '1967':22C '2':9C,10C '2013':36,37 'alvarez':5B,39,40 'bomba':11C,12C,25 'in':18C,31 'loc':41 'of':16C,29 'paquito':4B 'plena':13C,26 'puerto':19C,32 'puertorico':42 'rico':20C,33 'roots':15C,28 'salsa':17C,30 'saoco':6C,24 'the':14C,27 'tragos':3A 'tras':1A 'tres':2A 'vampisoul':34,35 'vol':7C,8C
                                    'tag_tracknum'  18
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629764.1490378  (2021-05-21 22:42:44)
                             'size'  4717902