======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '148'
                                          'artist'  'Ben Bernie'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  "I Can't Believe That You're In Love With Me"
                                           '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-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['all', 'jazz', '20s', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1927'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-big band'
                                             'bpm'  '108.938'
                                             'key'  '4B'
                                        '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))                     '108.938'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-big band'
'TCOP' (Copyright message)                          '1/27/27 Bruns. 3442'
'TDRC' (Recording time)                             '1927'
'TIT2' (Title/songname/content description)         "I Can't Believe That You're In Love With Me"
'TKEY' (Initial key)                                '4B'
'TLEN' (Length)                                     '148086'
'TPE1' (Lead performer(s)/Soloist(s))               'Ben Bernie'
'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-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['all', 'jazz', '20s', 'swing']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.20 dB'
'TXXX:replaygain_track_peak'                        '0.421562'

========================== row from database ==========================
                                              'id'  1516514
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ben Bernie and All The Lads - I Can_t Believe That You_re In Love With Me 1927.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  148
                                           'genre'  prerock-jb-jazz-o-big band
                                        'filesize'  2095104
                                           'mtime'  1620524253
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop All The Lads Can_t You_re 1927 prerock jb jazz big band
                                      'tag_artist'  Ben Bernie
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  I Can't Believe That You're In Love With Me
                                             'bpm'  108.938
                                    'search_title'  'believe':5 'can':2 'cant':4 'i':1 'in':10 'love':11 'me':13 're':8 't':3 'that':6 'with':12 'you':7 'youre':9
                                   'search_artist'  'ben':1 'bernie':2
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1927':13 'all':6 'band':17 'big':16 'can':9 'country':4 'exotica':2 'jazz':1 'jb':15 'lads':8 'oldies':3 'prerock':14 're':12 't':10 'the':7 'you':11
                                    'search_combo'  '00oldiepop':24 '1920s':16C '1927':32 '1930s':18C 'all':25 'and':17C 'band':36 'believe':5A 'ben':14B 'bernie':15B 'big':35 'can':2A,28 'cant':4A 'country':23 'exotica':21 'i':1A 'in':10A 'jazz':20 'jb':34 'lads':27 'love':11A 'me':13A 'oldies':22 'popular':19C 'prerock':33 're':8A,31 't':3A,29 'that':6A 'the':26 'with':12A 'you':7A,30 'youre':9A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['all', 'jazz', '20s', 'swing']
                                        'tag_date'  1927
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524253.4629188  (2021-05-09 03:37:33)
                             'size'  2095104