======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '201'
                                          'artist'  "Joseph C Smith's Orchestra"
                                     'text_people'  ''
                                         'release'  'Victor 18650'
                                           'title'  'That Naughty Waltz'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', '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'  '1920'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '131.8'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TALB' (Album/Movie/Show title)                     'Victor 18650'
'TBPM' (BPM (beats per minute))                     '131.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1920-04-10'
'TIT2' (Title/songname/content description)         'That Naughty Waltz'
'TKEY' (Initial key)                                '2A'
'TLEN' (Length)                                     '201000'
'TPE1' (Lead performer(s)/Soloist(s))               "Joseph C Smith's Orchestra"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'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'                        '+0.55 dB'
'TXXX:replaygain_track_peak'                        '0.466877'

========================== row from database ==========================
                                              'id'  1510799
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920/Joseph C Smith_s Orchestra - That Naughty Waltz 10-4-1920.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  201
                                           'genre'  prerock-band
                                        'filesize'  4104616
                                           'mtime'  1620559681
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920 Smith_s 10 4 1920 prerock band
                                      'tag_artist'  Joseph C Smith's Orchestra
                                     'tag_release'  Victor 18650
                                       'tag_title'  That Naughty Waltz
                                             'bpm'  131.8
                                    'search_title'  'naughty':2 'that':1 'waltz':3
                                   'search_artist'  'c':2 'joseph':1 'orchestra':6 's':4 'smith':3 'smiths':5
                                  'search_release'  '18650':2 'victor':1
                                     'search_rest'  '00oldiepop':5 '1920':6 '4':9 'band':11 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':10 's':8 'smith':7
                                    'search_combo'  '00oldiepop':16 '18650':11C '1920':17 '4':20 'band':22 'c':5B 'country':15 'exotica':13 'jazz':12 'joseph':4B 'naughty':2A 'oldies':14 'orchestra':9B 'prerock':21 's':7B,19 'smith':6B,18 'smiths':8B 'that':1A 'victor':10C 'waltz':3A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  2A
                                           '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-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1920
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559680.779062  (2021-05-09 13:28:00)
                             'size'  4104616