======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '195'
                                          'artist'  "Paul Howard's Quality Serenaders"
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "If You're A Viper"
                                           'quals'  ("['Q-JZFKS-2', 'Q-LOCALNESS-1', '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-1', "
 "'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'swing', 'los angeles', 'all', 'classic jazz']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '123.8'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '123.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1937-10-05'
'TIT2' (Title/songname/content description)         "If You're A Viper"
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '195000'
'TPE1' (Lead performer(s)/Soloist(s))               "Paul Howard's Quality Serenaders"
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', 'swing', 'los angeles', 'all', 'classic jazz']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.52 dB'
'TXXX:replaygain_track_peak'                        '0.638999'

========================== row from database ==========================
                                              'id'  1498648
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Paul Howard_s Quality Serenaders - If You_re A Viper 5-10-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  195
                                           'genre'  prerock-unsorted
                                        'filesize'  3952100
                                           'mtime'  1620386438
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 Howard_s You_re 5 10 1937 prerock unsorted
                                      'tag_artist'  Paul Howard's Quality Serenaders
                                     'tag_release'  None
                                       'tag_title'  If You're A Viper
                                             'bpm'  123.8
                                    'search_title'  'a':5 'if':1 're':3 'viper':6 'you':2 'youre':4
                                   'search_artist'  'howard':2 'howards':4 'paul':1 'quality':5 's':3 'serenaders':6
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1937':6 '5':11 'country':4 'exotica':2 'howard':7 'jazz':1 'oldies':3 'prerock':12 're':10 's':8 'unsorted':13 'you':9
                                    'search_combo'  '00oldiepop':17 '1937':18 '5':23 'a':5A 'country':16 'exotica':14 'howard':8B,19 'howards':10B 'if':1A 'jazz':13 'oldies':15 'paul':7B 'prerock':24 'quality':11B 're':3A,22 's':9B,20 'serenaders':12B 'unsorted':25 'viper':6A 'you':2A,21 'youre':4A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'swing', 'los angeles', 'all', 'classic jazz']
                                        'tag_date'  1937
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620386438.243349  (2021-05-07 13:20:38)
                             'size'  3952100