======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '176'
                                          'artist'  'Fats Waller'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  "I Won't Believe It (Till I Hear From You)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'Q-PIANO-3', 'q-chart-2', 'q-drums-1', 'q-other-3', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['piano', 'jazz', 'blues', 'jazz piano', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1938'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-soft-swing'
                                             'bpm'  '93.977'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '93.977'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-soft-swing'
'TDRC' (Recording time)                             '1938'
'TIT2' (Title/songname/content description)         "I Won't Believe It (Till I Hear From You)"
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '176410'
'TPE1' (Lead performer(s)/Soloist(s))               'Fats Waller'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['piano', 'jazz', 'blues', 'jazz piano', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.62 dB'
'TXXX:replaygain_track_peak'                        '0.882013'

========================== row from database ==========================
                                              'id'  1519964
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Fats Waller - I Won_t Believe It (Till I Hear From You) 1938.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  176
                                           'genre'  prerock-jb-jazz-soft-swing
                                        'filesize'  2484224
                                           'mtime'  1620524506
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Won_t 1938 prerock jb jazz soft swing
                                      'tag_artist'  Fats Waller
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  I Won't Believe It (Till I Hear From You)
                                             'bpm'  93.977
                                    'search_title'  'believe':5 'from':10 'hear':9 'i':1 'it':6 't':3 'till':7,8 'won':2 'wont':4 'you':11,12
                                   'search_artist'  'fats':1 'waller':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 '1938':10 'country':4 'exotica':2 'jazz':1 'jb':12 'oldies':3 'prerock':11 'soft':13 'swing':14 't':9 'won':8
                                    'search_combo'  '00oldiepop':23 '1920s':24 '1930s':25 '1938':28 '20s':15C '30s':17C 'and':16C 'believe':5A 'country':22 'exotica':20 'fats':13B 'from':10A 'hear':9A 'i':1A 'it':6A 'jazz':19 'jb':30 'oldies':21 'popular':18C 'prerock':29 'soft':31 'swing':32 't':3A,27 'till':7A,8A 'waller':14B 'won':2A,26 'wont':4A 'you':11A,12A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'Q-PIANO-3', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['piano', 'jazz', 'blues', 'jazz piano', 'swing']
                                        'tag_date'  1938
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524505.9762247  (2021-05-09 03:41:45)
                             'size'  2484224