======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '156'
                                          'artist'  'Mildred Bailey'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  "Rockin' Chair"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'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'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '84.175'
                                             'key'  '9A'
                                        'acoustid'  'd42e3a79-9cbd-4202-b50a-51f5746e73a9'
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))                     '84.175'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDOR' (Original release time)                      '2002'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "Rockin' Chair"
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '156483'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Mildred Bailey'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPUB' (Publisher)                                  'Classics Records'
'TSO2'                                              'Bailey, Mildred'
'TSOP' (Performer sort order)                       'Bailey, Mildred'
'TXXX:ASIN'                                         'B00007LIAA'
'TXXX:Acoustid Id'                                  'd42e3a79-9cbd-4202-b50a-51f5746e73a9'
'TXXX:BARCODE'                                      '3307517127921'
'TXXX:CATALOGNUMBER'                                '1279'
'TXXX:MusicBrainz Artist Id'                        'e079ff65-ad41-48e9-b6ce-8cdb0db64802'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', 'blues']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.89 dB'
'TXXX:replaygain_track_peak'                        '0.501341'
'UFID:http://musicbrainz.org'                       UFID(owner='http://musicbrainz.org', data=b'6155da57-fe88-4752-b565-bd2e96172f8d')

========================== row from database ==========================
                                              'id'  1513349
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Mildred Bailey - Rockin_ chair.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  156
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2525184
                                           'mtime'  1620524691
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Rockin_ chair prerock jb jazz unsorted
                                      'tag_artist'  Mildred Bailey
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  Rockin' Chair
                                             'bpm'  84.175
                                    'search_title'  'chair':3 'rockin':1,2
                                   'search_artist'  'bailey':2 'mildred':1
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 'chair':7 'country':4 'exotica':2 'jazz':1 'jb':9 'oldies':3 'prerock':8 'rockin':6 'unsorted':10
                                    'search_combo'  '00oldiepop':14 '1920s':6C '1930s':8C 'and':7C 'bailey':5B 'chair':3A,16 'country':13 'exotica':11 'jazz':10 'jb':18 'mildred':4B 'oldies':12 'popular':9C 'prerock':17 'rockin':1A,2A,15 'unsorted':19
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', '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-1', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['female vocalists', 'jazz vocal', 'jazz', 'vocal jazz', 'jazz divas', 'blues']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524691.439795  (2021-05-09 03:44:51)
                             'size'  2525184