======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '140'
                                          'artist'  'Bob Roubian with Cliffie Stone Orch.'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Cracker Stacker (Prep 109, 1957) 2'
                                           'quals'  ("['Q-OLDST-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1960'
                                        'comments'  ''
                                           'genre'  'set-th-novelty'
                                             'bpm'  '103.115'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '103.115'
'TCON' (Content type, a.k.a. Genre)                 'set-th-novelty'
'TDRC' (Recording time)                             '1960'
'TIT2' (Title/songname/content description)         'Cracker Stacker (Prep 109, 1957) 2'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Bob Roubian with Cliffie Stone Orch.'
'TXXX:Mp3gain_minmax'                               '096,206'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.19 dB'
'TXXX:replaygain_track_peak'                        '0.481510'

========================== row from database ==========================
                                              'id'  766291
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Zimelis [Chow, Baby!]/Bob Roubian with Cliffie Stone Orch. - Cracker Stacker (Prep 109, 1957) 2.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  140
                                           'genre'  set-th-novelty
                                        'filesize'  3363512
                                           'mtime'  1620343072
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Zimelis [Chow, Baby!] set novelty
                                      'tag_artist'  Bob Roubian with Cliffie Stone Orch.
                                     'tag_release'  None
                                       'tag_title'  Cracker Stacker (Prep 109, 1957) 2
                                             'bpm'  103.115
                                    'search_title'  '109':5,6 '1957':7,8 '2':9 'cracker':1 'prep':3,4 'stacker':2
                                   'search_artist'  'bob':1 'cliffie':4 'orch':6,7 'roubian':2 'stone':5 'with':3
                                  'search_release'  
                                     'search_rest'  'baby':8,9 'chow':6,7 'country':4 'exotica':2 'jazz':1 'novelty':11 'oldies':3 'set':10 'zimelis':5
                                    'search_combo'  '109':5A,6A '1957':7A,8A '2':9A 'baby':24,25 'bob':10B 'chow':22,23 'cliffie':13B 'country':20 'cracker':1A 'exotica':18 'jazz':17 'novelty':27 'oldies':19 'orch':15B,16B 'prep':3A,4A 'roubian':11B 'set':26 'stacker':2A 'stone':14B 'with':12B 'zimelis':21
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1960
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620343072.0742292  (2021-05-07 01:17:52)
                             'size'  3363512