======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '216'
                                          'artist'  'James P Johnson'
                                     'text_people'  ''
                                         'release'  '[non-album tracks]'
                                           'title'  "Mama's Blues (piano roll + Edwin E Wilson)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-1', 'q-other-4', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'ragtime', 'piano', 'stride', 'jazz piano']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1917'
                                        'comments'  ''
                                           'genre'  'prerock-ragtime'
                                             'bpm'  '85.0'
                                             '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'
'TALB' (Album/Movie/Show title)                     '[non-album tracks]'
'TBPM' (BPM (beats per minute))                     '85.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-ragtime'
'TDRC' (Recording time)                             '1917-09'
'TIT2' (Title/songname/content description)         "Mama's Blues (piano roll + Edwin E Wilson)"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '216000'
'TPE1' (Lead performer(s)/Soloist(s))               'James P Johnson'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'ragtime', 'piano', 'stride', 'jazz piano']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.03 dB'
'TXXX:replaygain_track_peak'                        '0.610012'

========================== row from database ==========================
                                              'id'  1522370
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1917/James P Johnson - Mama_s Blues (piano roll duet with Edwin E Wilson) -9-1917.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  216
                                           'genre'  prerock-ragtime
                                        'filesize'  4390411
                                           'mtime'  1620526792
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1917 Mama_s duet with 9 1917 prerock ragtime
                                      'tag_artist'  James P Johnson
                                     'tag_release'  [non-album tracks]
                                       'tag_title'  Mama's Blues (piano roll + Edwin E Wilson)
                                             'bpm'  85.0
                                    'search_title'  'blues':4 'e':9 'edwin':8 'mama':1 'mamas':3 'piano':5,6 'roll':7 's':2 'wilson':10,11
                                   'search_artist'  'james':1 'johnson':3 'p':2
                                  'search_release'  'album':2 'non':1 'nonalbum':3 'tracks':4,5
                                     'search_rest'  '00oldiepop':5 '1917':6 '9':11 'country':4 'duet':9 'exotica':2 'jazz':1 'mama':7 'oldies':3 'prerock':12 'ragtime':13 's':8 'with':10
                                    'search_combo'  '00oldiepop':24 '1917':25 '9':30 'album':16C 'blues':4A 'country':23 'duet':28 'e':9A 'edwin':8A 'exotica':21 'james':12B 'jazz':20 'johnson':14B 'mama':1A,26 'mamas':3A 'non':15C 'nonalbum':17C 'oldies':22 'p':13B 'piano':5A,6A 'prerock':31 'ragtime':32 'roll':7A 's':2A,27 'tracks':18C,19C 'wilson':10A,11A 'with':29
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', '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-2']
                                      'lastfmtags'  ['jazz', 'ragtime', 'piano', 'stride', 'jazz piano']
                                        'tag_date'  1917
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526791.543513  (2021-05-09 04:19:51)
                             'size'  4390411