======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '369'
                                          'artist'  'Paul Whiteman'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "I'se A-muggin' (Three T's) (part 1 & 2)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', 'bandleaders', '20s', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '103.010'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '103.010'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1936'
'TIT2' (Title/songname/content description)         "I'se A-muggin' (Three T's) (part 1 & 2)"
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Paul Whiteman'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', 'bandleaders', '20s', 'swing']
'TXXX:q-bass'                                       '2'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.75 dB'
'TXXX:replaygain_track_peak'                        '0.659992'

========================== row from database ==========================
                                              'id'  1513954
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1936/Paul Whiteman - I_se A-Muggin_ (Three T_s) (part 1 & 2) 10-3-1936.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  369
                                           'genre'  prerock-swing
                                        'filesize'  7393074
                                           'mtime'  1620560909
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1936 I_se Muggin_ T_s) 10 3 1936 prerock swing
                                      'tag_artist'  Paul Whiteman
                                     'tag_release'  None
                                       'tag_title'  I'se A-muggin' (Three T's) (part 1 & 2)
                                             'bpm'  103.01
                                    'search_title'  '1':14 '2':15,16 'a':4 'amuggin':6 'i':1 'ise':3 'muggin':5 'part':12,13 's':10 'se':2 't':9 'three':7,8 'ts':11
                                   'search_artist'  'paul':1 'whiteman':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1936':6 '3':14 'country':4 'exotica':2 'i':7 'jazz':1 'muggin':9 'oldies':3 'prerock':15 's':11,13 'se':8 'swing':16 't':10,12
                                    'search_combo'  '00oldiepop':23 '1':14A '1936':24 '2':15A,16A '3':32 'a':4A 'amuggin':6A 'country':22 'exotica':20 'i':1A,25 'ise':3A 'jazz':19 'muggin':5A,27 'oldies':21 'part':12A,13A 'paul':17B 'prerock':33 's':10A,29,31 'se':2A,26 'swing':34 't':9A,28,30 'three':7A,8A 'ts':11A 'whiteman':18B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', '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-2', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', 'bandleaders', '20s', 'swing']
                                        'tag_date'  1936
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560908.8238463  (2021-05-09 13:48:28)
                             'size'  7393074