======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '196'
                                          'artist'  "Waring's Pennsylvanians (Glee Club)"
                                     'text_people'  ''
                                         'release'  'Decca DL 5408'
                                           'title'  'Hello Young Lovers (solo - Joanne Wheatley)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1952'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '137.478'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Decca DL 5408'
'TBPM' (BPM (beats per minute))                     '137.478'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1952'
'TIT2' (Title/songname/content description)         'Hello Young Lovers (solo - Joanne Wheatley)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               "Waring's Pennsylvanians (Glee Club)"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.96 dB'
'TXXX:replaygain_track_peak'                        '0.569046'

========================== row from database ==========================
                                              'id'  1511203
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1952/Waring_s Pennsylvanians (Glee Club) - Hello Young Lovers (solo - Joanne Wheatley) 26-3-1951.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  196
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  3933843
                                           'mtime'  1620527655
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1952 Waring_s 26 3 1951 prerock jb jazz unsorted
                                      'tag_artist'  Waring's Pennsylvanians (Glee Club)
                                     'tag_release'  Decca DL 5408
                                       'tag_title'  Hello Young Lovers (solo - Joanne Wheatley)
                                             'bpm'  137.478
                                    'search_title'  'hello':1 'joanne':6 'lovers':3 'solo':4,5 'wheatley':7,8 'young':2
                                   'search_artist'  'club':7,8 'glee':5,6 'pennsylvanians':4 's':2 'waring':1 'warings':3
                                  'search_release'  '5408':3 'decca':1 'dl':2
                                     'search_rest'  '00oldiepop':5 '1951':11 '1952':6 '26':9 '3':10 'country':4 'exotica':2 'jazz':1 'jb':13 'oldies':3 'prerock':12 's':8 'unsorted':14 'waring':7
                                    'search_combo'  '00oldiepop':24 '1951':30 '1952':25 '26':28 '3':29 '5408':19C 'club':15B,16B 'country':23 'decca':17C 'dl':18C 'exotica':21 'glee':13B,14B 'hello':1A 'jazz':20 'jb':32 'joanne':6A 'lovers':3A 'oldies':22 'pennsylvanians':12B 'prerock':31 's':10B,27 'solo':4A,5A 'unsorted':33 'waring':9B,26 'warings':11B 'wheatley':7A,8A 'young':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1952
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620527655.2303426  (2021-05-09 04:34:15)
                             'size'  3933843