======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '130'
                                          'artist'  'Les Paul & Mary Ford'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'In The Good Old Summertime'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', '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']")
                                      'lastfmtags'  "['guitar', 'jazz', '50s', 'pop', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1952'
                                        'comments'  ''
                                           'genre'  'prerock-guitar'
                                             'bpm'  '135.274'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '135.274'
'TCON' (Content type, a.k.a. Genre)                 'prerock-guitar'
'TDRC' (Recording time)                             '1952'
'TIT2' (Title/songname/content description)         'In The Good Old Summertime'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Les Paul & Mary Ford'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['guitar', 'jazz', '50s', 'pop', 'oldies']
'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'                        '+1.77 dB'
'TXXX:replaygain_track_peak'                        '0.403852'

========================== row from database ==========================
                                              'id'  1445896
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1952/Les Paul & Mary Ford - In The Good Old Summertime 21-6-1952.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  130
                                           'genre'  prerock-guitar
                                        'filesize'  5205810
                                           'mtime'  1621705376
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1952 21 6 1952 prerock guitar
                                      'tag_artist'  Les Paul & Mary Ford
                                     'tag_release'  None
                                       'tag_title'  In The Good Old Summertime
                                             'bpm'  135.274
                                    'search_title'  'good':3 'in':1 'old':4 'summertime':5 'the':2
                                   'search_artist'  'ford':4 'les':1 'mary':3 'paul':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1952':6 '21':7 '6':8 'country':4 'exotica':2 'guitar':10 'jazz':1 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':14 '1952':15 '21':16 '6':17 'country':13 'exotica':11 'ford':9B 'good':3A 'guitar':19 'in':1A 'jazz':10 'les':6B 'mary':8B 'old':4A 'oldies':12 'paul':7B 'prerock':18 'summertime':5A 'the':2A
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', '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'  ['guitar', 'jazz', '50s', 'pop', 'oldies']
                                        'tag_date'  1952
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705375.67011  (2021-05-22 19:42:55)
                             'size'  5205810