======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '252'
                                          'artist'  'Foggy Bottom Classic Jazz Band'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  'Down by the riverside'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', 'Q-JZFKS-3', 'Q-UNU-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-dixiestyle'
                                             'bpm'  '92.602'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '92.602'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-dixiestyle'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'Down by the riverside'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Foggy Bottom Classic Jazz Band'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.28 dB'
'TXXX:replaygain_track_peak'                        '0.373501'

========================== row from database ==========================
                                              'id'  1455467
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00jazz/Foggy Bottom Classic JB/Down by the riverside.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  252
                                           'genre'  prerock-jb-jazz-o-dixiestyle
                                        'filesize'  5062228
                                           'mtime'  1620523971
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00jazz JB prerock jb jazz dixiestyle
                                      'tag_artist'  Foggy Bottom Classic Jazz Band
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Down by the riverside
                                             'bpm'  92.602
                                    'search_title'  'by':2 'down':1 'riverside':4 'the':3
                                   'search_artist'  'band':5 'bottom':2 'classic':3 'foggy':1 'jazz':4
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00jazz':5 'country':4 'dixiestyle':8 'exotica':2 'jazz':1 'jb':6 'oldies':3 'prerock':7
                                    'search_combo'  '00jazz':19 'album':11C 'band':9B 'bottom':6B 'by':2A 'classic':7B 'country':18 'dixiestyle':22 'down':1A 'exotica':16 'foggy':5B 'jazz':8B,15 'jb':20 'non':10C 'nonalbum':12C 'oldies':17 'prerock':21 'riverside':4A 'the':3A 'tracks':13C,14C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  2010
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620523971.147962  (2021-05-09 03:32:51)
                             'size'  5062228