======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '172'
                                          'artist'  'Georges Boulanger'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Salut d' Amour (Liebesgruss)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-vocals-1', 'q-mixbeat-1', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['violin', '20s', 'gypsy', 'classical', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-gypsy'
                                             'bpm'  '143.9'
                                             'key'  '10A'
                                        '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))                     '143.9'
'TCON' (Content type, a.k.a. Genre)                 'prerock-gypsy'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "Salut d' Amour (Liebesgruss)"
'TKEY' (Initial key)                                '10A'
'TLEN' (Length)                                     '172000'
'TPE1' (Lead performer(s)/Soloist(s))               'Georges Boulanger'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['violin', '20s', 'gypsy', 'classical', 'swing']
'TXXX:q-bass'                                       '1'
'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-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.03 dB'
'TXXX:replaygain_track_peak'                        '0.473644'

========================== row from database ==========================
                                              'id'  1497454
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1935/Georges Boulanger - Salut d_ Amour (Liebesgruss) 1935.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  172
                                           'genre'  prerock-gypsy
                                        'filesize'  3480535
                                           'mtime'  1621627232
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1935 d_ 1935 prerock gypsy
                                      'tag_artist'  Georges Boulanger
                                     'tag_release'  None
                                       'tag_title'  Salut d' Amour (Liebesgruss)
                                             'bpm'  143.9
                                    'search_title'  'amour':4 'd':2,3 'liebesgruss':5,6 'salut':1
                                   'search_artist'  'boulanger':2 'georges':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1935':6 'country':4 'd':7 'exotica':2 'gypsy':9 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':13 '1935':14 'amour':4A 'boulanger':8B 'country':12 'd':2A,3A,15 'exotica':10 'georges':7B 'gypsy':17 'jazz':9 'liebesgruss':5A,6A 'oldies':11 'prerock':16 'salut':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'Q-PIANO-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-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['violin', '20s', 'gypsy', 'classical', 'swing']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627231.7114527  (2021-05-21 22:00:31)
                             'size'  3480535