======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '173'
                                          'artist'  'Mantovani'
                                     'text_people'  ''
                                         'release'  'Decca F 5564'
                                           'title'  'Let Me Sing You To Sleep With A Love Song (vocal - Pat O’ Malley)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'orchestral', '50s', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '142.508'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Decca F 5564'
'TBPM' (BPM (beats per minute))                     '142.508'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Let Me Sing You To Sleep With A Love Song (vocal - Pat O’ Malley)'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Mantovani'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'orchestral', '50s', 'easy listening']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.13 dB'
'TXXX:replaygain_track_peak'                        '0.562822'

========================== row from database ==========================
                                              'id'  1438326
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Mantovani - Let Me Sing You To Sleep With A Love Song (vocal - Pat O’ Malley) 3-5-1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  173
                                           'genre'  prerock-band
                                        'filesize'  3462962
                                           'mtime'  1620560377
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 3 1935 prerock band
                                      'tag_artist'  Mantovani
                                     'tag_release'  Decca F 5564
                                       'tag_title'  Let Me Sing You To Sleep With A Love Song (vocal - Pat O’ Malley)
                                             'bpm'  142.508
                                    'search_title'  'a':8 'let':1 'love':9 'malley':15,16 'me':2 'o':14 'pat':13 'sing':3 'sleep':6 'song':10 'to':5 'vocal':11,12 'with':7 'you':4
                                   'search_artist'  'mantovani':1
                                  'search_release'  '5564':3 'decca':1 'f':2
                                     'search_rest'  '00oldiepop':5 '1935':6 '3':7 'band':9 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':25 '1935':26 '3':27 '5564':20C 'a':8A 'band':29 'country':24 'decca':18C 'exotica':22 'f':19C 'jazz':21 'let':1A 'love':9A 'malley':15A,16A 'mantovani':17B 'me':2A 'o':14A 'oldies':23 'pat':13A 'prerock':28 'sing':3A 'sleep':6A 'song':10A 'to':5A 'vocal':11A,12A 'with':7A 'you':4A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'orchestral', '50s', 'easy listening']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560376.7139764  (2021-05-09 13:39:36)
                             'size'  3462962