======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '195'
                                          'artist'  'Fred Astaire'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Isn't This A Lovely Day"
                                           '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-1', 'q-other-3', 'q-vocals-3', 'q-mixbeat-1', "
 "'Q-PIANO-3']")
                                      'lastfmtags'  "['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '116.3'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '116.3'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1935-06-27'
'TIT2' (Title/songname/content description)         "Isn't This A Lovely Day"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '195000'
'TPE1' (Lead performer(s)/Soloist(s))               'Fred Astaire'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']
'TXXX:q-bass'                                       '2'
'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-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+3.14 dB'
'TXXX:replaygain_track_peak'                        '0.540400'

========================== row from database ==========================
                                              'id'  1502836
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Fred Astaire - Isn_t This A Lovely Day ( film _ Top Hat _) 27-6-1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  195
                                           'genre'  prerock-swing
                                        'filesize'  3968608
                                           'mtime'  1620560720
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 Isn_t ( film _ Top Hat _) 27 6 1935 prerock swing
                                      'tag_artist'  Fred Astaire
                                     'tag_release'  None
                                       'tag_title'  Isn't This A Lovely Day
                                             'bpm'  116.3
                                    'search_title'  'a':5 'day':7 'isn':1 'isnt':3 'lovely':6 't':2 'this':4
                                   'search_artist'  'astaire':2 'fred':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1935':6 '27':12 '6':13 'country':4 'exotica':2 'film':9 'hat':11 'isn':7 'jazz':1 'oldies':3 'prerock':14 'swing':15 't':8 'top':10
                                    'search_combo'  '00oldiepop':14 '1935':15 '27':21 '6':22 'a':5A 'astaire':9B 'country':13 'day':7A 'exotica':11 'film':18 'fred':8B 'hat':20 'isn':1A,16 'isnt':3A 'jazz':10 'lovely':6A 'oldies':12 'prerock':23 'swing':24 't':2A,17 'this':4A 'top':19
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-3', '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-2', 'q-grit-1']
                                      'lastfmtags'  ['30s', 'oldies', 'jazz vocal', 'jazz', 'musicals', 'swing']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560720.3589592  (2021-05-09 13:45:20)
                             'size'  3968608