======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '124'
                                          'artist'  'mariachi vargas de tecalitlan'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'las alazanas'
                                           'quals'  ("['Q-OLDST-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'q-syn-2', "
 "'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', 'q-drums-1', "
 "'q-other-3', 'q-piano-1', 'q-vocals-2', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['mariachi', 'mexico', 'latin', 'folk', 'mexican']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '124.468'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '124.468'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-mor']
'TIT2' (Title/songname/content description)         'las alazanas'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'mariachi vargas de tecalitlan'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TSOP' (Performer sort order)                       'mariachi vargas de tecalitlan'
'TSOT' (Title sort order)                           'las alazanas'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf57.19.100'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:compatible_brands'                            'iso6mp41'
'TXXX:lastfmtags'                                   ['mariachi', 'mexico', 'latin', 'folk', 'mexican']
'TXXX:major_brand'                                  'dash'
'TXXX:minor_version'                                '0'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.69 dB'
'TXXX:replaygain_track_peak'                        '0.872290'

========================== row from database ==========================
                                              'id'  949114
                                            'path'  /data/Music/Bulk/sns/mariachi vargas de tecalitlan - las alazanas.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  124
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  2983936
                                           'mtime'  1621474630
                                   'redo_metaread'  0
                                        'rest_str'   sns set pl shirleyspinoza;set pl mor
                                      'tag_artist'  mariachi vargas de tecalitlan
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  las alazanas
                                             'bpm'  124.468
                                    'search_title'  'alazanas':2 'las':1
                                   'search_artist'  'de':3 'mariachi':1 'tecalitlan':4 'vargas':2
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  'mor':8 'pl':3 'set':2,5,7 'shirleyspinoza':4,6 'sns':1
                                    'search_combo'  'alazanas':2A 'de':5B 'las':1A 'mariachi':3B 'mor':16 'pl':11 'set':10,13,15 'shirley':7C 'shirleyspinoza':12,14 'sns':9 'spinoza':8C 'tecalitlan':6B 'vargas':4B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['mariachi', 'mexico', 'latin', 'folk', 'mexican']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621474629.7294736  (2021-05-20 03:37:09)
                             'size'  2983936