======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '165'
                                          'artist'  'Mildred Bailey'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Heat Wave (+ Glen Gray's Casa Loma Orchestra)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', "
 "'blues']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1933'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '129.2'
                                             '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))                     '129.2'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1933-10-28'
'TIT2' (Title/songname/content description)         "Heat Wave (+ Glen Gray's Casa Loma Orchestra)"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '165000'
'TPE1' (Lead performer(s)/Soloist(s))               'Mildred Bailey'
'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'                                   ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', 'blues']
'TXXX:q-bass'                                       '2'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+3.45 dB'
'TXXX:replaygain_track_peak'                        '0.647576'

========================== row from database ==========================
                                              'id'  1506242
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1933/Mildred Bailey - Heat Wave (+ Glen Gray_s Casa Loma Orchestra) 28-10-1933.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  165
                                           'genre'  prerock-band
                                        'filesize'  3354683
                                           'mtime'  1620560137
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1933 Gray_s 28 10 1933 prerock band
                                      'tag_artist'  Mildred Bailey
                                     'tag_release'  None
                                       'tag_title'  Heat Wave (+ Glen Gray's Casa Loma Orchestra)
                                             'bpm'  129.2
                                    'search_title'  'casa':7 'glen':3 'gray':4 'grays':6 'heat':1 'loma':8 'orchestra':9,10 's':5 'wave':2
                                   'search_artist'  'bailey':2 'mildred':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1933':6 '28':9 'band':11 'country':4 'exotica':2 'gray':7 'jazz':1 'oldies':3 'prerock':10 's':8
                                    'search_combo'  '00oldiepop':17 '1933':18 '28':21 'bailey':12B 'band':23 'casa':7A 'country':16 'exotica':14 'glen':3A 'gray':4A,19 'grays':6A 'heat':1A 'jazz':13 'loma':8A 'mildred':11B 'oldies':15 'orchestra':9A,10A 'prerock':22 's':5A,20 'wave':2A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-2', 'q-grit-1']
                                      'lastfmtags'  ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', 'blues']
                                        'tag_date'  1933
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620560136.913602  (2021-05-09 13:35:36)
                             'size'  3354683