======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '175'
                                          'artist'  'Eddy Duchin'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  'Pennies From Heaven'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'Q-PIANO-3', 'q-chart-2', 'q-drums-1', 'q-other-3', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'jazz', '30s', 'ost', 'usa']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-big band'
                                             'bpm'  '139.658'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1920s and 1930s popular'
'TBPM' (BPM (beats per minute))                     '139.658'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-big band'
'TDRC' (Recording time)                             '1937'
'TIT2' (Title/songname/content description)         'Pennies From Heaven'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '175076'
'TPE1' (Lead performer(s)/Soloist(s))               'Eddy Duchin'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'jazz', '30s', 'ost', 'usa']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                        '+2.34 dB'
'TXXX:replaygain_track_peak'                        '0.574930'

========================== row from database ==========================
                                              'id'  1141302
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Eddy Duchin - Pennies From Heaven 1937 (victor 25431).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  175
                                           'genre'  prerock-jb-jazz-o-big band
                                        'filesize'  2945171
                                           'mtime'  1620524494
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 (victor 25431) prerock jb jazz big band
                                      'tag_artist'  Eddy Duchin
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  Pennies From Heaven
                                             'bpm'  139.658
                                    'search_title'  'from':2 'heaven':3 'pennies':1
                                   'search_artist'  'duchin':2 'eddy':1
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1937':6 '25431':9,10 'band':14 'big':13 'country':4 'exotica':2 'jazz':1 'jb':12 'oldies':3 'prerock':11 'victor':7,8
                                    'search_combo'  '00oldiepop':14 '1920s':6C '1930s':8C '1937':15 '25431':18,19 'and':7C 'band':23 'big':22 'country':13 'duchin':5B 'eddy':4B 'exotica':11 'from':2A 'heaven':3A 'jazz':10 'jb':21 'oldies':12 'pennies':1A 'popular':9C 'prerock':20 'victor':16,17
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', '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-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'jazz', '30s', 'ost', 'usa']
                                        'tag_date'  1937
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524493.5949938  (2021-05-09 03:41:33)
                             'size'  2945171