======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '163'
                                          'artist'  'Cyril Stapleton & His Orchestra'
                                     'text_people'  ''
                                         'release'  'Internet'
                                           'title'  "The Children's Marching Song (Nick Nack Taddy Whack)"
                                           '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-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['all', 'blue star', 'crime jazz', 'spotify']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '112'
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '84.140'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '59-110 POS 13'
'COMM:ID3v1 Comment:XXX'                            '59-110 POS 13'
'COMM:MusicMatch_Tempo:\x00\x00\x00'                'None'
'TALB' (Album/Movie/Show title)                     'Internet'
'TBPM' (BPM (beats per minute))                     '84.140'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1959'
'TIT2' (Title/songname/content description)         "The Children's Marching Song (Nick Nack Taddy Whack)"
'TKEY' (Initial key)                                '9B'
'TLEN' (Length)                                     '163000'
'TPE1' (Lead performer(s)/Soloist(s))               'Cyril Stapleton & His Orchestra'
'TRCK' (Track number/Position in set)               '112'
'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'                                   ['all', 'blue star', 'crime jazz', 'spotify']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.96 dB'
'TXXX:replaygain_track_peak'                        '0.497492'

========================== row from database ==========================
                                              'id'  1504185
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1959/59-110 - Cyril Stapleton & His Orchestra - The Children_s Marching Song (Nick Nack Taddy Whack).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  163
                                           'genre'  prerock-swing
                                        'filesize'  6533705
                                           'mtime'  1620562669
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1959 59 110 Children_s prerock swing
                                      'tag_artist'  Cyril Stapleton & His Orchestra
                                     'tag_release'  Internet
                                       'tag_title'  The Children's Marching Song (Nick Nack Taddy Whack)
                                             'bpm'  84.14
                                    'search_title'  'children':2 'childrens':4 'marching':5 'nack':9 'nick':7,8 's':3 'song':6 'taddy':10 'the':1 'whack':11,12
                                   'search_artist'  'cyril':1 'his':3 'orchestra':4 'stapleton':2
                                  'search_release'  'internet':1
                                     'search_rest'  '00oldiepop':5 '110':8 '1959':6 '59':7 'children':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':11 's':10 'swing':12
                                    'search_combo'  '00oldiepop':22 '110':25 '1959':23 '59':24 'children':2A,26 'childrens':4A 'country':21 'cyril':13B 'exotica':19 'his':15B 'internet':17C 'jazz':18 'marching':5A 'nack':9A 'nick':7A,8A 'oldies':20 'orchestra':16B 'prerock':28 's':3A,27 'song':6A 'stapleton':14B 'swing':29 'taddy':10A 'the':1A 'whack':11A,12A
                                    'tag_tracknum'  112
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['all', 'blue star', 'crime jazz', 'spotify']
                                        'tag_date'  1959
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562668.7768888  (2021-05-09 14:17:48)
                             'size'  6533705