======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '156'
                                          'artist'  'Miles Davis'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Bye Bye Theme '
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-2', "
 "'Q-OLDST-1', 'Q-PLAY-3', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-vocals-1', 'q-mixbeat-1', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['fusion', 'jazz', 'trumpet', 'blues', 'bebop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1961'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '145.476'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.476'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1961'
'TIT2' (Title/songname/content description)         'Bye Bye Theme '
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Miles Davis'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['fusion', 'jazz', 'trumpet', 'blues', 'bebop']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.27 dB'
'TXXX:replaygain_track_peak'                        '0.544806'

========================== row from database ==========================
                                              'id'  1337689
                                            'path'  /data/Music/Bulk/00poprockelectronic/Miles Davis/Fridaynight at the Blackhawk Vol. 1 [1961]/Miles Davis - Bye Bye Theme - 05.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  156
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2500462
                                           'mtime'  1620540934
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Fridaynight at the Blackhawk Vol. 1 [1961] 05 prerock jb jazz unsorted
                                      'tag_artist'  Miles Davis
                                     'tag_release'  None
                                       'tag_title'  Bye Bye Theme 
                                             'bpm'  145.476
                                    'search_title'  'bye':1 'theme':2
                                   'search_artist'  'davis':2 'miles':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '1':8 '1961':9,10 'at':3 'blackhawk':5 'fridaynight':2 'jazz':13 'jb':12 'prerock':11 'the':4 'unsorted':14 'vol':6,7
                                    'search_combo'  '00poprockelectronic':5 '1':12 '1961':13,14 'at':7 'blackhawk':9 'bye':1A 'davis':4B 'fridaynight':6 'jazz':17 'jb':16 'miles':3B 'prerock':15 'the':8 'theme':2A 'unsorted':18 'vol':10,11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-4', 'q-syn-1', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['fusion', 'jazz', 'trumpet', 'blues', 'bebop']
                                        'tag_date'  1961
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620540933.5587492  (2021-05-09 08:15:33)
                             'size'  2500462