======================== unified (from filesystem) ========================
                                         'bitrate'  '142.614'
                                        'duration'  '259'
                                          'artist'  'John Coltrane'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Autumn Serenade'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['free jazz', 'avant garde', 'jazz', 'saxophone', 'bebop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1963'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-newer-experimental or free'
                                             'bpm'  '113.010'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '113.010'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-newer-experimental or free'
'TDRC' (Recording time)                             '1963'
'TIT2' (Title/songname/content description)         'Autumn Serenade'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'John Coltrane'
'TRCK' (Track number/Position in set)               '6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['free jazz', 'avant garde', 'jazz', 'saxophone', 'bebop']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.47 dB'
'TXXX:replaygain_track_peak'                        '0.621295'

========================== row from database ==========================
                                              'id'  1296512
                                            'path'  /data/Music/Bulk/00poprockelectronic/John Coltrane/Coltrane & Hartman [1963]/John Coltrane And Johnny Hartman - 06 - Autumn Serenade.mp3
                                         'working'  None
                                         'bitrate'  142
                                    'duration_sec'  259
                                           'genre'  prerock-jb-jazz-newer-experimental or free
                                        'filesize'  4628377
                                           'mtime'  1620540869
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic & Hartman [1963] And Johnny Hartman 06 prerock jb jazz newer experimental or free
                                      'tag_artist'  John Coltrane
                                     'tag_release'  None
                                       'tag_title'  Autumn Serenade
                                             'bpm'  113.01
                                    'search_title'  'autumn':1 'serenade':2
                                   'search_artist'  'coltrane':2 'john':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '1963':3,4 'and':5 'experimental':11 'free':13 'hartman':2 'jazz':9 'jb':8 'johnny':6 'newer':10 'or':12 'prerock':7
                                    'search_combo'  '00poprockelectronic':5 '1963':7,8 'and':9 'autumn':1A 'coltrane':4B 'experimental':15 'free':17 'hartman':6 'jazz':13 'jb':12 'john':3B 'johnny':10 'newer':14 'or':16 'prerock':11 'serenade':2A
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['free jazz', 'avant garde', 'jazz', 'saxophone', 'bebop']
                                        'tag_date'  1963
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620540868.8313599  (2021-05-09 08:14:28)
                             'size'  4628377