======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '166'
                                          'artist'  'Jack Jackson'
                                     'text_people'  ''
                                         'release'  'HMV B-6330'
                                           'title'  'Come On Be Happy (vocal - Al Bowlly)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-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-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['united kingdom', 'surf rock', 'uk']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1933'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '116.253'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'HMV B-6330'
'TBPM' (BPM (beats per minute))                     '116.253'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1933'
'TIT2' (Title/songname/content description)         'Come On Be Happy (vocal - Al Bowlly)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Jack Jackson'
'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:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['united kingdom', 'surf rock', 'uk']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.28 dB'
'TXXX:replaygain_track_peak'                        '0.611583'

========================== row from database ==========================
                                              'id'  1441609
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1933/Jack Jackson - Come On Be Happy (vocal - Al Bowlly) 24-2-1933.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  166
                                           'genre'  prerock-swing
                                        'filesize'  3340355
                                           'mtime'  1620560234
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1933 24 2 1933 prerock swing
                                      'tag_artist'  Jack Jackson
                                     'tag_release'  HMV B-6330
                                       'tag_title'  Come On Be Happy (vocal - Al Bowlly)
                                             'bpm'  116.253
                                    'search_title'  'al':7 'be':3 'bowlly':8,9 'come':1 'happy':4 'on':2 'vocal':5,6
                                   'search_artist'  'jack':1 'jackson':2
                                  'search_release'  '6330':3 'b':2 'b6330':4 'hmv':1
                                     'search_rest'  '00oldiepop':5 '1933':6 '2':8 '24':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'swing':10
                                    'search_combo'  '00oldiepop':20 '1933':21 '2':23 '24':22 '6330':14C 'al':7A 'b':13C 'b6330':15C 'be':3A 'bowlly':8A,9A 'come':1A 'country':19 'exotica':17 'happy':4A 'hmv':12C 'jack':10B 'jackson':11B 'jazz':16 'oldies':18 'on':2A 'prerock':24 'swing':25 'vocal':5A,6A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           '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-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['united kingdom', 'surf rock', 'uk']
                                        'tag_date'  1933
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560233.5290072  (2021-05-09 13:37:13)
                             'size'  3340355