======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '179'
                                          'artist'  'Eddy Duchin'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'Lovely To Look At'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'Q-PLAY-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-vocals-2', 'q-mixbeat-1', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['oldies', 'jazz', '30s', 'ost', 'usa']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '111.394'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:ô\x0f\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xf4\x0f\x00\x00')
'PRIV:PeakValue:\x89~\x00\x00'                      PRIV(owner='PeakValue', data=b'\x89~\x00\x00')
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '111.394'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'Lovely To Look At'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Eddy Duchin'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'jazz', '30s', 'ost', 'usa']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.08 dB'
'TXXX:replaygain_track_peak'                        '0.587818'

========================== row from database ==========================
                                              'id'  1139392
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Eddy Duchin - Lovely To Look At  (with Carmen Cavallero)  (1935 #1).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  179
                                           'genre'  prerock-band
                                        'filesize'  2883265
                                           'mtime'  1620559772
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s (with Carmen Cavallero) (1935 #1) prerock band
                                      'tag_artist'  Eddy Duchin
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  Lovely To Look At
                                             'bpm'  111.394
                                    'search_title'  'at':4 'look':3 'lovely':1 'to':2
                                   'search_artist'  'duchin':2 'eddy':1
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1':15,16 '1920s':6 '1930s':7 '1935':13,14 'band':18 'carmen':10 'cavallero':11,12 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':17 'with':8,9
                                    'search_combo'  '00oldiepop':15 '1':25,26 '1920s':16 '1930s':17 '1935':23,24 '20s':7C '30s':9C 'and':8C 'at':4A 'band':28 'carmen':20 'cavallero':21,22 'country':14 'duchin':6B 'eddy':5B 'exotica':12 'jazz':11 'look':3A 'lovely':1A 'oldies':13 'popular':10C 'prerock':27 'to':2A 'with':18,19
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', '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-2', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'jazz', '30s', 'ost', 'usa']
                                        'tag_date'  1930
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559772.0264857  (2021-05-09 13:29:32)
                             'size'  2883265