======================== unified (from filesystem) ========================
                                         'bitrate'  '80.0'
                                        'duration'  '441'
                                          'artist'  'Original Dixieland Jazz Band'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Medley'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['new orleans', 'american', 'jazz', 'dixieland', 'dixieland jazz']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '115.392'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:±\x10\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xb1\x10\x00\x00')
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\x00\x00')
'TBPM' (BPM (beats per minute))                     '115.392'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'Medley'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Original Dixieland Jazz Band'
'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:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['new orleans', 'american', 'jazz', 'dixieland', 'dixieland jazz']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.30 dB'
'TXXX:replaygain_track_peak'                        '0.504660'

========================== row from database ==========================
                                              'id'  1525751
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/30_s collection/original dixieland jazz band - medley.mp3
                                         'working'  None
                                         'bitrate'  80
                                    'duration_sec'  441
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  4419640
                                           'mtime'  1620527919
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 30_s collection original dixieland jazz band medley prerock jb jazz unsorted
                                      'tag_artist'  Original Dixieland Jazz Band
                                     'tag_release'  None
                                       'tag_title'  Medley
                                             'bpm'  115.392
                                    'search_title'  'medley':1
                                   'search_artist'  'band':4 'dixieland':2 'jazz':3 'original':1
                                  'search_release'  
                                     'search_rest'  '30':5 'band':10 'collection':7 'country':4 'dixieland':9 'exotica':2 'jazz':1 'jb':13 'medley':11 'oldies':3 'original':8 'prerock':12 's':6 'unsorted':14
                                    'search_combo'  '30':10 'band':5B,15 'collection':12 'country':9 'dixieland':3B,14 'exotica':7 'jazz':4B,6 'jb':18 'medley':1A,16 'oldies':8 'original':2B,13 'prerock':17 's':11 'unsorted':19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['new orleans', 'american', 'jazz', 'dixieland', 'dixieland jazz']
                                        'tag_date'  1935
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620527919.0145836  (2021-05-09 04:38:39)
                             'size'  4419640