======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '271'
                                          'artist'  'C.J. Chenier'
                                     'text_people'  'Carter'
                                         'release'  ''
                                           'title'  'Richest Man'
                                           'quals'  ("['Q-OLDST-2', 'Q-UNU-1', 'Q-HAP-2', 'Q-JZFKS-2', 'Q-LOCALNESS-2', 'q-syn-2', "
 "'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-2', "
 "'q-other-3', 'q-piano-1', 'q-vocals-3', 'Q-HHRNBTT-1', 'q-mixbeat-2']")
                                      'lastfmtags'  "['zydeco', 'blues', 'louisiana', 'cajun', 'bluediamonds']"
                                     'discogstags'  "['zydeco']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '9'
                                      'tracktotal'  ''
                                            'date'  '2004'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues'
                                             'bpm'  '113.836'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '113.836'
'TCOM' (Composer)                                   'Carter'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-blues'
'TDRC' (Recording time)                             '2004'
'TIT2' (Title/songname/content description)         'Richest Man'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'C.J. Chenier'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Alligator Records'
'TRCK' (Track number/Position in set)               '9'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'zydeco'
'TXXX:lastfmtags'                                   ['zydeco', 'blues', 'louisiana', 'cajun', 'bluediamonds']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.76 dB'
'TXXX:replaygain_track_peak'                        '0.564144'

========================== row from database ==========================
                                              'id'  1350436
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/C.J. Chenier - Richest Man [General Blues].mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  271
                                           'genre'  prerock-jb-blues
                                        'filesize'  6508567
                                           'mtime'  1620403811
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] [General Blues] prerock jb blues
                                      'tag_artist'  C.J. Chenier
                                     'tag_release'  None
                                       'tag_title'  Richest Man
                                             'bpm'  113.836
                                    'search_title'  'man':2 'richest':1
                                   'search_artist'  'c':1 'chenier':4 'cj':3 'j':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'blues':9,10 'files':5,6 'general':7,8 'jb':12 'loose':3,4 'prerock':11 'unsorted':2
                                    'search_combo'  '00poprockelectronic':7 'blues':15,16 'c':3B 'chenier':6B 'cj':5B 'files':11,12 'general':13,14 'j':4B 'jb':18 'loose':9,10 'man':2A 'prerock':17 'richest':1A 'unsorted':8
                                    'tag_tracknum'  9
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['zydeco', 'blues', 'louisiana', 'cajun', 'bluediamonds']
                                        'tag_date'  2004
                                     'discogstags'  ['zydeco']

============================== file details ==============================
                                           'mtime'  1620403810.9623003  (2021-05-07 18:10:10)
                             'size'  6508567