======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '166'
                                          'artist'  'ambrose orch'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'eleven-thirty saturday night'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', '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']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '110.182'
                                             '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))                     '110.182'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         'eleven-thirty saturday night'
'TKEY' (Initial key)                                '6A'
'TLEN' (Length)                                     '166471'
'TPE1' (Lead performer(s)/Soloist(s))               'ambrose orch'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'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'                        '+2.39 dB'
'TXXX:replaygain_track_peak'                        '0.561493'

========================== row from database ==========================
                                              'id'  1502869
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ambrose Mayfair Hotel Orchestra, Sam Brown - _Leven-Thirty Saturday night.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  166
                                           'genre'  prerock-unsorted
                                        'filesize'  2674688
                                           'mtime'  1621697845
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Ambrose Mayfair Hotel Orchestra, Sam Brown _Leven Thirty Saturday prerock unsorted
                                      'tag_artist'  ambrose orch
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  eleven-thirty saturday night
                                             'bpm'  110.182
                                    'search_title'  'eleven':1 'eleventhirty':3 'night':5 'saturday':4 'thirty':2
                                   'search_artist'  'ambrose':1 'orch':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'ambrose':8 'brown':14 'country':4 'exotica':2 'hotel':10 'jazz':1 'leven':15 'mayfair':9 'oldies':3 'orchestra':11,12 'prerock':18 'sam':13 'saturday':17 'thirty':16 'unsorted':19
                                    'search_combo'  '00oldiepop':16 '1920s':17 '1930s':18 '20s':8C '30s':10C 'ambrose':6B,19 'and':9C 'brown':25 'country':15 'eleven':1A 'eleventhirty':3A 'exotica':13 'hotel':21 'jazz':12 'leven':26 'mayfair':20 'night':5A 'oldies':14 'orch':7B 'orchestra':22,23 'popular':11C 'prerock':29 'sam':24 'saturday':4A,28 'thirty':2A,27 'unsorted':30
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', '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'  []
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697844.7965226  (2021-05-22 17:37:24)
                             'size'  2674688