======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '204'
                                          'artist'  'Billie Holiday'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Let's Call The Whole Thing Off"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['vocal jazz', 'blues', 'jazz', 'female vocalists', 'jazz vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '124.698'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '124.698'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         "Let's Call The Whole Thing Off"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Billie Holiday'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['vocal jazz', 'blues', 'jazz', 'female vocalists', 'jazz vocal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.08 dB'
'TXXX:replaygain_track_peak'                        '0.685613'

========================== row from database ==========================
                                              'id'  1515015
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/Billie Holiday - Let_s Call The Whole Thing Off 1956.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  204
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  4097732
                                           'mtime'  1620527746
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 Let_s 1956 prerock jb jazz unsorted
                                      'tag_artist'  Billie Holiday
                                     'tag_release'  None
                                       'tag_title'  Let's Call The Whole Thing Off
                                             'bpm'  124.698
                                    'search_title'  'call':4 'let':1 'lets':3 'off':8 's':2 'the':5 'thing':7 'whole':6
                                   'search_artist'  'billie':1 'holiday':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1956':6 'country':4 'exotica':2 'jazz':1 'jb':10 'let':7 'oldies':3 'prerock':9 's':8 'unsorted':11
                                    'search_combo'  '00oldiepop':15 '1956':16 'billie':9B 'call':4A 'country':14 'exotica':12 'holiday':10B 'jazz':11 'jb':20 'let':1A,17 'lets':3A 'off':8A 'oldies':13 'prerock':19 's':2A,18 'the':5A 'thing':7A 'unsorted':21 'whole':6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['vocal jazz', 'blues', 'jazz', 'female vocalists', 'jazz vocal']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527745.7291224  (2021-05-09 04:35:45)
                             'size'  4097732